Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Multi-Deck Rotary Switches
SERIES 42, 43, 44 and 54
1" Diameter, 1 Amp, Standard,
Military SR04
Features
• Rugged Construction Ensures
Switch Operation for the Life of
Your Equipment
• Many Circuitry Options
• MIL Qualified Versions MIL-S-3786/04
• Features Choice Include: Shaft/
Panel Seal, Adjustable Stops, PC
Termination, UL Recognized
DIMENSIONS in inches (and millimeters)
Standard, UL Recognized and
Military Qualified Solder Lug Styles
Rear Views
Series 42
1.015 ± .015
(25,78 ± 0,38) DIA.
OVER TERMINALS
36°
#1 THREAD
.064 (1,63) MIN. DIA.
HOLE AFTER PLATING
DIM. E
± .010 (0,25)
1.170 ± .015
(29,72 ± 0,38) DIA.
OVER TERMINALS
6
1
7
15°
5
3/8-32 UNEF-2A THREAD
(MTG. HOLE = 3/8 DIA. MIN.)
9
10
12
11
8
BUSHING KEyWAy
.066 ± .002 (1,68 ± 0,05) WIDE By
.036 ± .003 (0,91 ± 0,08) DEEP
FROM A .375 (9,53) DIA.
NON-TURN TAB
.125 ± .003 (3,18 ± 0,08) WIDE By
.031 ± .003 (0,79 ± 0,08) THICK
GRAyHILL
INTEGRAL ASSEMBLy NUT,
DO NOT REMOVE
C
L OF BUSHING
KEyWAy
SEE NOTE
3
DIM. C
± .015 (0,38)
Series 44
.250 + .001 –.002
(6,35 + 0,03 –0,05)
DIA.
4
.219
± .005
(5,56
± 0,13)
GRAyHILL
10
1
DIM. B REF.
STUD
PROJECTION
2
DIM. F ± .015 (0,38)
7
8
9
4
2
Rotary Switches
.250
± .020
(6,35
± 0,51)
DIM. A + .046 –.020
(+ 0,05 –0,51)
3
.437
± .020
(11,10
± 0,51)
5
.437
± .020
(11,10
± 0,51)
6
DIM. D
± .010 (0,25) DIA.
OF NON-TURN
C
L
.375 TAB
± .015
(9,53
± 0,38)
30°
Note: Common location for a single pole per
deck switch. For common location on
multi-pole switches, see circuit
diagrams.
.064 (1,63) MIN. DIA.
HOLE AFTER PLATING
For rear view of 45°, 60° and 90°,
see circuit diagram.
No.
of
Decks
Dimension
A
1
2
3
4
5
6
1.025 (26,04)
1.371 (34,82)
1.717 (43,61)
2.063 (52,40)
2.409 (61,19)
3.005 (76,33)
Dimension B
Approx. Weight
No. Dimension B
Style
Style Grams
of
Dimension
Style
Style
A
M or H
42
44
Decks
A
A
M or H
.062 (1,57)
.062 (1,57)
.062 (1,57)
.062 (1,57)
.062 (1,57)
.312 (7,92)
.030 (0,76)
.030 (0,76)
.030 (0,76)
.030 (0,76)
.030 (0,76)
.280 (7,11)
40.0
45.5
51.0
56.5
62.0
67.5
Grayhill part number and date code marked on detent cover label.
Customer part number marked on request. Military part number
marked when required. UL recognized markings as required.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
48
7
3.351 (85,16)
55
8
3.697 (93,90)
62
9
4.043 (102,69)
69
10
4.389 (111,48)
76 11 4.735 (120,27)
83
12
5.081 (129,06)
Dimension
Series 42
Series 44
C
.312 (7,92)
.312 (7,92)
.312 (7,92)
.312 (7,92)
.312 (7,92)
.312 (7,92)
D
.280 (7,11)
.280 (7,11)
.280 (7,11)
.280 (7,11)
.280 (7,11)
.280 (7,11)
E
Approx. Weight
Grams
42
44
73.0
78.5
84.0
89.5
95.0
100.5
90
97
104
111
118
125
F
.562 (14,27) 1.000 (25,4)
.830 (21,08) .093 (2,36)
.642 (16,31) 1.162 (29,51) 1.000 (25,4) .121 (3,07)
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Multi-Deck Rotary Switches
CIRCUIT DIAGRAMS: Solder Lug Terminals
Switch is Viewed From Shaft End and Shown in Position No. 1
Note: All common terminals are located above base terminals as shown.
10
12
C1
1
6
4
C
L
1 C1
6
5
2
C2
C3
9
C4
10 11
7
8
C4
12
C
L
1 C1
6
5
4
3
C5
9 10
7
6
2
C3
FOUR POLE
C
L OF
BUSHING
KEyWAy
9
8
6
5
10
1
5
4
3
C2
1
2
C
L
C1
FIVE OR SIX POLE
Rear Views
C4
7
6
C2
8
4
CL
1 C1
8
4
1
2
3
7
C3 5
CL
C1
15°
2
3
C2
45°
TWO POLE THREE OR FOUR POLE
6
4
3
3
2
CL
1 C1
C2
2
15°
3
1
5
6
4
C
L
1 C1
C1
3
5
6
4
C2
4
C3
5
6
C
L OF
BUSHING
KEyWAy
2
ONE POLE
6
4
5
2
7
6
5
1
C6
2
60°
TWO POLE THREE POLE
C
L OF
BUSHING
KEyWAy
4
4
C2 3
3
C
L
1 C1
C1
1
15°
3
Series 44
90° Angle
of Throw
4
GRAyHILL
ONE POLE
1
2
2
2
ONE POLE
TWO POLE
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
90°
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
C
L OF
BUSHING
KEyWAy
C1
Series 44
60° Angle
of Throw
2
C1
C1
2
TWO POLE
4
5
3
4
CL
9
3
5
1
8
4
8
3
6
10 C
L
2
7
6
7
6
5
C1
ONE POLE
Series 44
45° Angle
of Throw
C2
1
4
3
12
C2
5
11
12
C2
Series 42 & 43
36° Angle
of Throw
11
TWO POLE THREE POLE
THREE POLE
Styles A, D and S
Styles M, MS, H and HS
8
7
C3
7
2
3
4
10
GRAyHILL
ONE POLE
3
12
9
GRAyHILL
5
2
3
8
11
8
4
10
7
C
L
1 C1
6
C3
9
1
5
8
11
C2 7
12
7
9
8
1
Series 44 & 54
30° Angle
of Throw
C
L OF
BUSHING
11 KEyWAy
2
8
10
3
9
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Multi-Deck Rotary Switches
Recommended Panel Cutout
For all 42/43/44/54 Series
Sealed Version
(Including 42P Style)
For all 42/43/44/54 Series
Non-Sealed Version
(Except 42P Style)
MIL-DTL-3786/4L
I
'
I
G
-=..
�o:T
.375
.135
DIA
•.002
. 154 5 � :
Rotary Switches
---,-I
I
I
---.375 DIA
+.004
-.000
gg�
FOR USE ON SEALED SWITCHES
FOR USE WITH NON-TURN DEVICES
NOTES:
1.
2.
3.
Dimensions are in inches.
Metric equivalents are given for general information only.
Unless otherwise specified, tolerances are ±.003 (0.08 mm) on diameters, ±.005 (0.13 mm)
on all other dimensions, and ±2° on angles.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Multi-Deck Rotary Switches
SERIES 42
1" Diameter, 1 Amp, PC Mount
Features
• Satisfies High Current Board Level
Applications
• 36° Angle of Throw Permits up to
Ten Positions
• UL Recognized Versions
DIMENSIONS in inches (and millimeters)
DIM. A + .046 – .020
(+1,17 –0,00)
C
L C
L C
L
.437 ± .020
(11,10 ± 0,51)
.600 ± .031
(15,24 ± 0,79)
.174
± .010
(4,42
± 0,25)
.250 ± .020
(6,35 ± 0,51)
#1 THREAD
Termination
One-sided termination is standard for switches with 2 to 5
positions per pole. Two-sided termination is standard for
switches with 6 thru 10 positions per pole.
6 thru 10 positions
per pole and terminals from one
side of switch are
available on special
order. See Special
Options, page F-10
or contact Grayhill.
10
1
9
8
C
L OF
BUSHING
KEyWAy
2
3
C1
PC BOARD MOUNTING PATTERN
CL OF FRONT SUPPORT
PLATE MOUNTING
HOLES
.375
(9,53)
TyP.
.500
(12,7)
TyP.
.750
(19,05)
.250
TyP.
(6,35)
TyP.
6
5
2
Standard Style
CL OF BASE
TERMINAL
MOUNTING
HOLES
CL OF REAR
SUPPORT
PLATE
MOUNTING
HOLES
CL COMMON
TERMINAL
MOUNTING
HOLES
.174 (4,42)
TyP.
.492
(12,50)
4
7
.110 (2,79)
.174 (4,42) TyP.
ONE POLE
1.470 ± .020
(37,34 ± 0,51)
TYP.
.250 ± .015
(6,35 ± 0,38) TYP.
.187 ± .015
(4,75 ± 0,38) TYP.
.735 ± .010
(18,67 ± 0,25) TYP.
Shaft And panel seal: Srs. 42 & 44
Shown for a two deck switch
SHAFT END
Note: All common terminals are located above
base terminals as shown.
3
5
Switch is Viewed From Shaft End
and Shown in Position No. 1
3/8-32 UNEF-2A THREAD
(MTG. HOLE=3/8 DIA. MIN.)
7
The Series 42/44 Styles, which include the letter "S" with
the exception of style "HS", are watertight sealed to the
mounting panel by utilizing the panel seal kit.These switches
are built with a front plate that does not have a non-turn tab.
The panel seal kit consists of a grooved hex nut, a keyed
washer and a keyed panel seal. The grooved hex nut is
assembled to the switch bushing. The keyed washer is slid
down the bushing slot and seated into the hex nut groove.
The seal is likewise assembled to the bushing and hex nut.
The keyed washer is required to provide seal integrity in the
bushing slot. When assembled to the panel, the grooved
nut, backing washer and seal require the same space as a
normal mounting nut. Hence, the seal kit does not alter the
dimensions. Panel seal kit includes a non-turn washer to
be used into a blind hole in the back panel. For panel seal
kit part dimensions, see Accessories. Style "HS" switches
use a similar sealing method, except the integral assembly
nut retains the panel seal. All sealed style switches are
provided with a shaft to bushing internal seal.
adjustable stop switches: Series 42 and 44
5
3
4
T
RS P
FI TO
S
3
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
FI
ST RST
OP
4
6
7
5
9
11
The standard and UL recognized switches are also Equivalent Styles
For style 44M30, use 44D30 initially
available with adjustable stops. Two removable For style 42A36, use 42D36,
For style 42U36, use 42UD36
stop washers allow you to limit the number of For style 44A30, use 44D30
For style 44U30, use 44UD30
For style 42M36, use 42D36 initially
switch positions as needed. A knurled nut is
supplied to secure the washers if desired.
These switches have no bushing keyway. All other
Front Views
dimensions, ratings and characteristics are the
8
8 9 10
6
same as the standard fixed stop styles. Although
not military qualified, the adjustable styles are
useful in military equipment prototypes. However,
USE OF KNURLED
when submitting the equipment for government
NUT IS OPTIONAL
approval, the fixed stop qualified style should
Series
42
Series
44
be substituted.
2
Rotary Switches
C
L OF BUSHING
KEYWAY
Grayhill part number and date code marked on detent cover label. Customer part number marked on request. UL recognized marking as required.
COMMON LUG
INTEGRAL ASSEMBLY NUT,
DO NOT REMOVE
BUSHING KEYWAY
.066 ± .002 (1,68 ± 0,05) WIDE BY
.036 ± .003 (0,91 ± 0,08) DEEP
FROM A .375 (9,53) DIA.
.500 ± .015
(12,7 ± 0,38)
TYP.
10
8
.250 + .001 –.002
(6,35 + 0,03 –0,05)
DIA.
TERMINAL DIMENSIONS AT THIS
POINT ARE .050 ± .005 (1,27 ± 0,13)
WIDE BY .020 ± .003 (0,51 ± 0,08) THICK
CIRCUIT DIAGRAM: PC Mount
1
9
.830
± .010
(21,08
± 0,25)
.750 ± .010
(19,05 ± 0,25)
TYP.
.375 ± .015
(9,53 ± 0,38) TYP.
.786 ± .010
(19,96 ± 0,25)
DIA.
GRAYHILL
.219
± .005
(5,56
± 0,13)
DIM. B REF.
STUD
PROJECTION
.174 ± .010
(4,42 ± 0,25)
4
1.000 ± .010
(25,4 ± 0,25)
DIA.
6
Standard Style
ADJUSTABLE STOP
WASHERS
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Multi-Deck Rotary Switches
SERIES 43
SERIES 54
1" Diameter, 1 Amp, Concentric
Shafts
Features
• Two Switches in the Panel Space
of a Single Shaft Rotary
• Military Qualified Versions
MIL-3786/04
• Choice of 10 Positions (Series 43)
or 12 Positions (Series 54)
DIMENSIONS in inches (and millimeters)
Standard Style and Military Qualified
Rear Views
BUSHING KEyWAy .066 ± .002 (1,68 ± 0,05)
WIDE By .036 ± .003 (0,91 ± 0,08) DEEP FROM
A .375 (9,53) DIA.
3/8-32 UNEF-2A THREAD
GRAyHILL
1.170 ± .015
(29,72 ± 0,38) DIA.
OVER TERMINALS
.030 (0,76)
.030 (0,76)
.280 (7,11)
.030 (0,76)
.280 (7,11)
.280 (7,11)
.280 (7,11)
.280 (7,11)
.280 (7,11)
48
54
60
54
60
66
60
66
72
60
67
74
67
74
81
74
81
88
15°
10
9
GRAyHILL
.062 (1,57)
.062 (1,57)
.062 (1,57)
.062 (1,57)
.062 (1,57)
.312 (7,92)
.062 (1,57)
.312 (7,92)
.312 (7,92)
12
1.818 (46,18)
2.164 (54,97)
2.510 (63,75)
2.164 (54,97)
2.510 (63,75)
3.105 (78,87)
2.510 (63,75)
3.105 (78,87)
3.451 (87,66)
11
1
Series
54
2
Series
43
5
Style
M or H
6
Style
A
7
Style
A, M or H
3
Approx. Weight
Grams
8
1
1
1
2
2
2
3
3
3
Series 54
4
Number of
Decks
Dimension A
Dimension B
1
2
3
1
2
3
1
2
3
10
MILITARy NUMBER MARKED ON ALL
QUALIFIED SWITCHES
INTEGRAL ASSEMBLy NUT, DO NOT REMOVE
Note: Common location for a single pole per
deck switch. For common location on
multi-pole switches, see circuit
diagrams.
.064 (1,63) MIN. DIA.
HOLE AFTER PLATING
30°
.064 (1,63) MIN. DIA.
HOLE AFTER PLATING
Grayhill part number and date code marked on detent cover label. Customer part number
marked on request. Military part number marked when required.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
SEE NOTE
Section Section
“A”
“B”
36°
4
C
L OF BUSHING
KEyWAy
7
8
9
SECTION
SECTION
A
B
CONTROLLED By
.250 (6,35) .125 (3,18)
DIA. SHAFT
NON-TURN TAB
.125 ± .003 (3,18 ± 0,08) WIDE By
.031 ± .003 (0,79 ± 0,08) THICK
#1 THREAD
.830 (21,08)
SER. 43
1.000 (25,4)
SER. 54
± .010 (0,25)
.125 + .001 –.002
(3,18 + 0,03 –0,05) DIA.
.250 + .001 –.002
(6,35 + 0,03 –0,05) DIA.
1.015 ± .015
(25,78 ± 0,38)
OVER TERMINALS
DIM. B REF.
STUD
PROJECTION
1
.093 ± .015 (2,36 ± 0,38)
SER. 43
.121 ± .015 (3,07 ± 0,38)
SER. 54
2
.250 ± .020 (6,35 ± 0,51)
Series 43
5
.642 (16,31)
SER. 54
.562 (14,27)
SER. 43
±.015(0,38)
DIM. A + .046 –.020
(+0,05 –0,51)
.375
± .020
(9,53
± 0,51)
6
.094 ± .004
(2,39 ± 0,10)
.219 ± .005
(5,56 ± 0,13)
.375
± .020
(9,53
± 0,51)
3
1.162 (29,51) DIA.
SER. 54
1.000 (25,4) DIA.
SER. 43
OF NON-TURN
C
L
.375 TAB
.250 ± .020
± .015
(6,35 ± 0,51)
(9,53
± 0,25)
.250 ± .020
(6,35 ± 0,51)
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Multi-Deck Rotary Switches
SERIES 43 and 54
1" Diameter, 1 Amp, Add-A-Pot
Features
• Central Shaft Designed to Operate
an Add-On Potentiometer
• Potentiometer Mounting Plates
Provided
• Adjustable Stop Standard, Fixed
Stop by Order
• Choice of 10 Positions (Series 43)
or 12 Positions (Series 54)
DIMENSIONS In inches (and millimeters)
Standard Style
Rear Views
Series 43
.375
± .020
(9,53
± 0,51)
DIM. A + .046 –.020
(+0,05 –0,51)
.375
± .020
(9,53
± 0,51)
.625 ± .046
(15,88 ± 1,17)
C OF NON-TURN
.375 L
TAB
± .015
(9,53
.250 ± .020
± 0,38)
(6,35 ± 0,51)
.250 ± .020
(6,35 ± 0,51)
7
.140 ± .062
(3,56 ± 1,57)
#1 THREAD
8
10
5
4
T
RS
FI TOP
S
2
3
7
1
12
1
15°
2
60
67
74
3
9
4
48
54
60
10
5
.974 (24,74)
1.320 (33,53)
1.666 (42,32)
11
6
6
Approx. Weight
Grams
Dimension
A
Series 43 Series 54
7
F
ST IRST
OP
1
2
3
1.170 ± .015
(29,72 ± 0,38)
OVER TERMINALS
8
11
5
Series 54
Note: Common location for a single pole per
deck switch. For common location on
multi-pole switches, see circuit diagrams.
30°
2
3
4
.642 ± .015
(16,31 ± 0,38)
Two potentiometer mounting plates are
supplied. Mounting plates have .261 (6,63)
and .380 (9,65) diameter holes respectively
for mounting potentiometers with 1/4" and 3/8"
bushings. Additional nuts for the through bolts
of the switch are provided for adjustment of
mounting plate location. Tapered tongue on
1
/8" shaft provides coupling to screwdriver slots
in potentiometer shafts.
2
3/8-32 UNEF-2A THREAD
Number
of
Decks
10
4
USE OF KNURLED NUT
OPTIONAL
NON-TURN TAB
.125 ± .003 (3,18 ± 0,08) WIDE By
.031 ± .003 (0,79 ± 0,08) THICK
9
.064 (1,63) MIN. DIA.
HOLE AFTER PLATING
STOP WASHERS
1.162 ± .010
(29,51 ± 0,25)
DIA.
5
36°
SEE NOTE
Series 54
6
.125 + .001 –.002
(3,18 + 0,03 –0,05) DIA.
.250 + .001 –.002
(6,35 + 0,03 –0,05) DIA.
7
9
.830 (21,08) SER. 43
1.000 (25,4) SER. 54
± .010 (0,25)
9
Rotary Switches
.562
± .015
(14,27
± 0,38)
8
1.015 ± .015
(25,78 ± 0,38)
OVER TERMINALS
8
6
.094 ± .004
(2,39 ± 0,10)
.219 ± .005
(5,56 ± 0,13)
Series 43
.093 ± .015 (2,36 ± 0,38)
SER. 43
.121 ± .015 (3,07 ± 0,38)
SER. 54
.250 ± .020 (6,35 ± 0,51)
3
1.000 ± .010
(25,4 ± 0,25)
DIA.
Plated brass spacers for ease of positioning
mounting plate driving assembly are available
on special request (sold only with switches). The
use of spacers is recommended for other than
prototype requirements. When ordering switches
with spacers, give full details regarding special
length, potentiometer being used, etc.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
Standard style, concentric shaft, add-a-pot
switches have adjustable stops. See Adjustable
Stop description.
Grayhill part number and date code marked on detent cover
label. Customer part number marked on request. Military
part number marked when required.
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Multi-Deck Rotary Switches
SERIES 54
1" Diameter, 1 Amp, Add-A-Pot
Features
• Military Qualified MIL-3786/04
• Central Shaft Designed to Operate
MIL Potentiometer
• Mounting Plate Options Provide
Choice of Potentiometer
• Fixed Distance from Switch to
Mounting Plate
DIMENSIONS In inches (and millimeters)
Military Qualified Style
DIM. A + .046 –.020
(+ 0,05 –0,51)
.250 ± .020
(6,35 ± 0,51)
.121 ± .015
(3,07 ± 0,38)
.575
(14,61)
REF.
.140 ± .062
(3,56 ± 1,57)
#1
THREAD
1.024 (26,01)
1.370 (34,80)
1.716 (43,59)
12
1
BUSHING KEyWAy .066 ± .002 (1,68 ± 0,05)
WIDE By .036 ± .003 (0,91 ± 0,08) DEEP FROM
A .375 (9,53) DIA.
Potentiometer Mounting
Approximate
Weight
Grams
The two mounting plates shown below are supplied with
each switch.
60
67
74
27.5
±2
.245 ± .003
(6,22 ± 0,08) R.
Series 54M Add-A-Pot Switch is a concentric
shaft unit with provision for potentiometer
mounting. Outer shaft operates switch decks.
Inner shaft terminates in tapered tongue,
which allows any desired potentiometer to be
mounted.The Series 54M Add-A-Pot is qualified
to MIL-DTL-3786/4-3. Patent No. 3,297,830.
Grayhill part number and date code marked on detent
cover label. Customer part number marked on request.
Military part number marked when required.
30°
.098 ± .003
(2,49 ± 0,08) DIA. (3)
.130 ± .003
(3,30 ± 0,08)
DIA. (2)
.437 ± .003
(11,10 ± 0,08) R.
15 ± 2
.380 ± .003
(9,65 ± 0,08)
DIA. (1)
THROUGH BOLT
HOLE (2 EA.)
15
±2
1.265
(32,13)
DIA.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
Mounting Plate A
.261 ± .003
(6,63 ± 0,08) DIA. (1)
.375 ± .003
(9,53 ± 0,08) R.
9
±2
1.265
(32,13)
DIA.
.531 ± .003
(13,49 ± 0,08) R.
Mounting Plate B
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
1
2
3
SEE
POTENTIOMETER
MOUNTING
INTEGRAL ASSEMBLy NUT,
DO NOT REMOVE
3/8-32 NEF-2A THREAD
Note: Common locations for a single pole per
deck switch. For common location on
multiple switches, see circuit diagram.
15°
GRAyHILL OR CUSTOMER PART NUMBER
MARKED ON SWITCH COVER UPON REQUEST.
MILITARy NUMBER MARKED ON ALL
QUALIFIED SWITCHES
NON-TURN TAB
.125 ± .003 (3,18 ± 0,08) WIDE By
.031 ± .003 (0,79 ± 0,08) THICK
Number
of
Dimension
Decks
A
9
6
.018 ± .005 (0,46 ± 0,13)
.052 ± .005 (1,32 ± 0,13)
10
7
.642
± .015
(16,31
± 0,38)
11
8
.219 ± .005
(5,56 ± 0,13)
1.000
± .010
(25,4
± 0,25)
2
(6,35 ± 0,51)
.125 + .001 –.002
(3,18 + 0,03 –0,05) DIA.
.250 + .001 –.002
(6,35 + 0,03 –0,05) DIA.
1.170 ± .015
(29,72 ± 0,38)
OVER TERMINALS
3
.375
± .020
(9,53
± 0,51)
4
.375
± .020
(9,53
± 0,51)
5
1.162 ± .010
(29,51 ± 0,25)
DIA.
C
L OF NON-TURN
TAB
.375
± .015
(9,53
± 0,38)
.250 ± .020
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Multi-Deck Rotary Switches
Military Qualified
Single Shaft Switches
The military styles of the single shaft Series
42 and 44 rotary switches are qualified to MILDTL-3786/4, specifically SR04-1. Qualification
includes two temperature ranges. Unsealed
styles M, MB, MG and MBG are qualified for -65
to 85°C. Unsealed styles H, HB, HG and HBG,
plus sealed styles HS, HBS, HGS and HBGS
are qualified for -65°C to 125°C. Qualification
includes low level switching and shaft grounding
as specified in MIL-DTL-3786. Qualification
includes 30°, 36°, 45°, 60° and 90° angles of throw
with solder lug terminals. The military styles are
dimensionally the same as the standard styles
with two exceptions. The location of the common
for the 3-pole switch differs (see circuit diagrams)
and the non-turn tab for styles HS, HBS, HGS
and HBGS differs per the Shaft and Panel Seal
description following.
Two Switches, Concentric Shafts
The M style of the concentric shaft Series 43
and 54 switches is qualified to MIL-DTL-3786/4,
specifically SR04-2. Unsealed switches are
qualified for -65°C to 85°C in 30°, 36°, 45°,
60° and 90° throws. The standard and military
styles of the concentric switches have the same
dimensions with the exception of the location of
the 3 pole common (see circuit diagrams). The
30° and 36° throws are described in the ordering
information. If the 45°, 60° and 90° throws are
required, they can be provided in Section A of
the Series 54 Rotary Switches; see Standard
Options, page J-9.
Add-A-Pot Switches
The military style of the add-a-pot Series 54
switch is qualified to MIL-DTL-3786/4, specifically
SR04-3. These unsealed switches are qualified
for -65°C to 85°C in 30°, 45°, 60° and 90° throws.
The dimensions of the military style add-a-pot
switches are not the same as the standard adda-pot switches; see drawings.
All Qualified Switches
Complete electrical ratings and characteristics
for all of these qualified switches are listed on
the following pages. Standard variations such
as terminals, shaft and/or bushing length etc.,
which do not affect performance, can be marked
as qualified product. Adjustable stops cannot
be qualified. Contact Grayhill for details about
variations.
Military qualified switches may be ordered by the
military M number listed in MIL-DTL-3786/4 or
by the Grayhill part number. They will be marked
to specifications.
Military Qualified Shaft and
Panel Seal:
Styles HS, HBS, HGS and HBGS
The shaft is sealed to the bushing by an internal
O-ring per MIL-P-5516B. The bushing is sealed
to the panel with a silicone rubber washer and
a stainless steel backing washer. The combined
uncompressed thickness is 0.055" (1,40). Since
this switch has a flat cover, a non-turn washer is
supplied (see Panel Seal Kit). If using it, mount
it in front of the panel.
Specifications:
Electrical Ratings
Rotary Switches
115 Vac resistive
6-28 Vdc resistive
115 Vac inductive
115 Vdc inductive
6-28 Vdc inductive
115 Vdc resistive
30° or 36°
1 amp
1 amp
0.25 amp
0.02 amp
0.10 amp
0.10 amp
Angle of Throw
45° or 60°
90°
5 amps 5 amps
1 amp
2 amps
2 amps 2 amps
—
—
—
—
—
—
To carry 10 amps continuously.
Contact Resistance: 50 milliohms maximum
Insulation Resistance: 1,000 megaohms
minimum
Voltage Breakdown: 1,000 Vac initially (500
Vac or better after most environmental tests)
Life Expectancy: 100,000 mechanical cycles
of operation. Note: Actual life is determined
by a number of factors, including electrical
loading, rate of rotation and environment, as
well as maximum voltage breakdown required
at the end of life.
UL Recognition–
Styles UA, UD, UM, UP, US and USP
Grayhill styles A and M and their variations (D, P,
S and SP) of the Series 42, 43, 44 and 54 rotary
switches have been tested by Underwriters
Laboratories. The letter U in the style indicates
proper marking as required by Underwriters
Laboratories. These switches are recognized
under file number E35289. The UL rating for the
Series 42, 43, 44 and 54 is as follows:
Electrical Parameters: style UA = 1.0 ampere
at 125 Vac. Style UM = 1.0 ampere at 125 Vac
and also .5 ampere at 125 Vac, inductive load,
0.75 to 0.8 power factor.
Rating based on the following criteria:
Overload: 50 operations at 150% rated AC
load
Endurance: 6000 operations at the rated load
with 1000 Vac dielectric strength before and
after test
Temperature Rise: Not to exceed 30°C when
carrying rated AC load after test.
Note: all dimensional drawings for the standard
style Series 42, 43, 44 and 54 also apply to these
switches, with the exception that switches are
marked per specifications.
Electrical Ratings
Military Style
General Rating: This rating is based on standard
Grayhill tests of the Military style switch done at
ambient conditions. It is provided for comparison
to the Standard Style switch.
Charts shown for non-shorting contacts (break
before make)
7
CURRENT (AMPS)
Rated: To make and break the following
loads:
6
5
VOLTAGE 115 VAC
RESISTIVE
4
3
2
1
0
0
10
25
50
CyCLES x 1,000
1.7
CURRENT (AMPS)
Standard Style
1.5
VOLTAGE 30 VDC
RESISTIVE
1.2
1.0
.75
INDUCTIVE
(2.8 HENRIES)
.50
.20
0
0
10
25
50
CyCLES x 1,000
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
Voltage and Load: As listed in the chart
One cycle is 360° rotation and a return through
all switch positions to the starting position. The
data for the curves was measured at sea level,
25°C and 68% relative humidity.
The Series 42, 43, 44 and 54, style M, H and
HS switches are made to meet requirements
of MIL-DTL-3786, style SR04. Diallyl phthalate
molded parts and the design of internal
switching elements provide exceptional
performance.
Curves shown are typical load-life curves for
Series 42, 43, 44 and 54, style M, H and HS
switches with 30° or 36° angles of throw. They
show the numbers of cycles of rotational life
expectancy for the types of loads shown. Thus,
with a 5 amp, 115 Vac resistive load, 10,000
cycles of life is expected. If the load is reduced
to 3 amps, life is increased to 25,000 cycles.The
larger angles of throw (45°, 60° or 90°) switch
larger currents for a like number of cycles.
Life limiting or failure criteria for these curves
are:
C o n t a c t R e s i s t a n c e : 5 0 milliohms
maximum
Insulation Resistance: 1,000 megaohms
minimum between mutually insulated parts
Voltage Breakdown: 1,000 Vac minimum
between mutually insulated parts. These
switches will carry 10 amps with maximum
contact temperature rise of 20°C. Life can
be predicted by Grayhill if less critical life
characteristics, elevated temperature or
reduced pressure is involved.
MIL-S-3786 Electrical Values
Military Style
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Multi-Deck Rotary Switches
specifications:
Style M switches, at 85°C, approximately 68%
humidity and sea level pressure and style H
and HS at 125°C have been tested to make
and break the following loads as stated in
MIL-DTL-3786/SR04; 250 milliamperes at
28 Vdc resistive, 100 milliamperes at 28 Vdc
inductive (2.8 henries); 75 milliamperes at 115
Vac resistive.
These switches have also been tested at
reduced barometric pressure (70,000 feet),
25°C at approximately 68% relative humidity to
make and break the following loads as stated
in MIL-DTL-3786/SR04; 200 milliamperes,
28 Vdc resistive; 25 milliamperes, 28 Vdc
inductive (2.8 henries); 20 milliamperes, 115
Vac resistive. When tested to these loads and
conditions the style M, H and HS switches
meet the following life limiting or failure criteria
after 25,000 cycles in accordance with MILS-3786.
Contact Resistance: 50 milliohms
maximum
Insulation Resistance: 1,000 megaohms
minimum between terminals and shafts
Dielectric Strength: 1,000 Vac (atmospheric
pressure) and 450 Vac (reduced pressure)
minimum between mutually insulated parts.
Bases: Melamine per (MIL-M-14) ASTM-D5948
Cover, Deck Separators, End Plate and Rotor
Mounting Plate: Phenolic per (MIL-M-14)
ASTM-D-5948
Mounting Bushings: Brass, tin/zinc-plated.
Shaft, Cover Plate, Retaining Rings,Through
Bolts, Shaft Extensions, Stop Arm, Thrust
Washers Stop Washers and Rear Support
Plate: Stainless Steel
Detent Balls: Steel, nickel-plated
Detent Springs: Tinned music wire
Rotor Contact, Stator (Base) Contacts:
Silver alloy
Terminals (Except Common): Brass, tin
plated
Common Plate, Including Solder Lug: Brass,
silver-plated .0003" minimum
Mounting Hardware: Two mounting nuts .094"
(2,39) thick by .562" (14,27) across flats and
one internal tooth lockwasher are supplied with
each switch.
Stud Nuts, Mounting Nuts, Lock Washers:
Tin/zinc-plated or stainless steel.
Materials and Finishes
Military Qualified
Bases: Diallyl per (MIL-M-14) ASTM-D-5948
Cover, Deck Separators, End Plate and
Rotor Mounting Plate: Diallyl per (MIL-M-14)
ASTM-D-5948
These switches also meet MIL-DTL-3786/
SR04 for moisture resistance, medium and
high shock, vibration (10 to 2000 cps), thermal
shock (-65°C to 125°C), salt spray, explosion
and terminal pull.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
Mounting Bushings: Brass, tin/zinc-plated.
Shaft, Cover Plate, Retaining Rings,
Through Bolts, Shaft Extensions, Stop Arm,
Stop Washers, Thrust Washers and Rear
Support Plate: Stainless steel
Detent Balls: Steel, nickel-plated
Detent Springs: Tinned music wire
Rotor Contact: Silver alloy
Terminals, Common Plate including Solder
Lug: Brass, silver-plated .0003" minimum
Mounting Hardware: Two mounting nuts .094"
thick by .562" across flats and one internal tooth
lockwasher are supplied with each switch.
Stud Nuts, Mounting Nuts, Lock Washers:
Tin/zinc-plated or stainless steel.
Additional Characteristics
Standard Style and Military Qualified
Contact: Shorting or non-shorting wiping
contacts with over 150 grams of contact
force
Rotational Torque: 8-115 ounce-inches
depending upon the number of poles per deck,
number of decks and angle of throw
Mechanical Life Expectancy: 100,000 cycles
of operation
Shaft Flat Orientation: Flat opposite
contacting position of pole number one (See
circuit diagram).
Stop Strength: For Standard style: 15 poundinches minimum. For Adjustable stop styles:
12 pound-inches
Extended Stud: Single shaft switches of six or
more decks and concentric shaft switches of a
combination of five or more decks (Standard
style) or four or more decks (Military style)
have longer studs with extra mounting nuts for
recommended double end mount.
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
When tested at sea level 25°C and 68% relative
humidity with failure criteria of 50 milliohms
max. and 750 Vac breakdown voltage, these
switches will make and break the following
loads: 250 mA at 28 Vdc, inductive (2.8 henries);
1.25 amps at 28 Vdc resistive; 2.0 amps at 115
Vac, 60 Hz resistive, for 10,000 cycles.
Materials and Finishes
Standard Style
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Multi-Deck Rotary Switches
Choices and limitations: Series 42, 43, 44 and 54
A = Standard, Solder Lugs
P = Standard, PC Mount Terminals
D = Standard, Adjustable Stops
H = Military Qualified, 125°C
B = Military, Grounded Shaft
G = Military, Low Level Rating
S = Shaft and Panel Seal
U = UL Recognized
M = Military Qualified 85°C4
Single Shaft Switches
Style Choices
Angle of
Series Unsealed
Shaft/Panel Seal Throw
Number of
Decks
36°
42
Poles
Per Deck
Positions
Per Pole1,3
Shorting or
Non-Shorting
01 thru 12
01 thru 12
1
2
02 thru 103
02 thru 05
N or S
N or S
30°
01 thru 12
01 thru 12
01 thru 08
01 thru 06
01 thru 04
01 thru 04
1
2
3
4
5
6
02 thru 123
02 thru 06
02 thru 04
02 or 03
02
02
N or S
N or S
N or S
N or S
N or S
N or S
45°
01 thru 12
01 thru 06
01 thru 04
01 thru 03
1
2
3
4
02 thru 083
02 thru 04
02
02
N or S
N or S
N
N
60°
01 thru 12
01 thru 06
01 thru 04
1
2
3
02 thru 063
02 or 03
02
N
N
N
90°
01 thru 12
01 thru 06
1
2
02 thru 043
02
N
N
30°
01 thru 12
01 thru 12
01 thru 08
01 thru 06
1
2
3
4
AJ (2 thru 12)1
AJ (2 thru 6)1
AJ (2 thru 4)1
AJ (2 or 3)1
N or S
N or S
N or S
N or S
36°
01 thru 12
01 thru 12
1
2
AJ (2 thru 10)1
AJ (2 thru 5)1
N or S
N or S
36°
01 thru 12
1
02 thru 103
N or S
A
UA
UM5
M
MB
MG
MBG
H
HB
HG
HBG
44
S
US
—
MS4
MBS4
MGS4
MBGS4
HS
HBS
HGS
HBGS
Rotary Switches
44
D
UD
—
—
42
P
UP
42
SP
USP
Concentric Shaft Switches
Series
Style Angle of Section A (Front) Section B (Rear)
Choices Throw
Decks
Poles Position
N or S
Decks
Poles
Position
N or S
CONCENTRIC SHAFT, 2 SWITCHES
54
A2
UA2
M2
43
30°
01 thru 03
01 thru 03
1
2
36°
01 thru 03
1
30°
01 thru 03
01 thru 03
36°
30°
02 thru 123
02 thru 06
N or S
N or S
01 thru 03
01 thru 03
01 or 02
01
01
01
1
2
3
4
5
6
02 thru 123
02 thru 06
02 thru 04
02 or 03
02
02
N or S
N or S
N or S
N or S
N or S
N or S
02 thru 105
N or S
01 thru 03
01 thru 03
1
2
02 thru 103
02 thru 05
N or S
N or S
1
2
AJ (2-12)1
AJ (2-6)1
N or S
N or S
01 thru 03
1
AJ (2-10)1
N or S
01 thru 03
01 thru 03
1
2
02 thru 125
02 thru 06
N or S
N or S
ADD-A-POT
SWITCHES
54
43
54
D
UD
M
For Adjustable Stop (with the letter D), use AJ
instead of number of positions when ordering.
2
For 45°, 60° or 90° throws in Series 54 switches
of these styles, see Standard Options.
3
For single pole switches with the maximum
positions per pole, continuous rotation is possible.
Specify fixed stop or continuous rotation when
ordering single shaft switches. Concentric shaft
switches have continuous rotation.
1
Second shaft operates a potentiometer
supplied by the customer.
Rear mounting plates are provided.
Styles which include both M and S are not
qualified but are made of the same materials
and construction as qualified types. For qualified
switches with shaft and panel seal, use equivalent
HS style.
5
UM switches are made of the same materials and
construction as the M style switches. For military
switch UM is not required; use M style.
4
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Multi-Deck Rotary Switches
Accessories
Internal Tooth Lockwasher–Figure A
For a 3/8" bushing. Approximately 0.500" (12,7)
outside diameter, .022" (0,56) thickness.
Material is cadmium-plated steel. Part No.
12Q1272-1
For a 1/4" bushing. Approximately
0.400" (10,16) outside diameter,
.018" (0,46) thickness. Material is
FIGuRE A
steel, tin/zinc plated.
Non-Turn Washer–Figure B
Can be ordered as extra hardware for the Series
5000, 24, 42, 43, 44, 54, 71B, 53, 57 and 59
rotary switches. The internal key of the washer
slides into the bushing keyway. The right angle
tab locks into a predrilled hole on the back side
of the mounting panel. Material is brass, tin/zinc
plated. Part No. 12C1087-1
bushing to the panel. The kit consists of four
items: a grooved hex nut, a keyed washer, a
keyed seal and a non-turn washer. Assembly is
described on Page J-53. Dimensions of panel seal
kit items are shown in Figure C. This kit seals the
bushing to the panel; it does not seal the shaft
to the bushing. Not usable with adjustable stop
switches. Part No. 42-24
.625 ± .010
(15,88 ± 0,25) DIA.
.375 + .004 – .000
(9,53 + 0,10) DIA.
.375 ± .005
(9,53 ± 0,13)
CL
Panel Seal Kit–Figure C
.125 ± .003
(3,18 ± 0,08)
Non-turn Washer
Sold as a separate item to seal the switch
.060 ± .002
(1,52 ± 0,05)
.154
+ .004
–.000
(3,91
+ 0,10
–0,00)
DIA.
.625 ± .010
(15,88 ± 0,25)
DIA.
.376 + .003 –.000
(9,55 + 0,08 –0,00)
DIA.
.437 ± .010
(11,10 ± 0,25)
.032 ± .002
(0,81 ± 0,05)
.125 ± .010
(3,18 ± 0,25)
.120 ± .003
(3,18 ± 0,08)
FIGuRE B
.032
± .002
(0,81
± 0,05)
.045 ± .003
(1,14 ± 0,08)
.562 (14,27)
ACROSS
FLATS
.010 ± .002
(0,25 ± 0,05)
.187 ± .010
(4,75 ± 0,25)
.088 (2,24)/
.093 (2,36)
Seal
FIGuRE C
Keyed Washer
Hex Nut
ORDERING INFORMATION: Single Shaft Switches, Add-A-Pot Switches
44M30–02–1–12N–F
Stop Arrangement: Add letter F to a one pole per deck switch with the maximum number of positions for a
stop between position 1 and the last position. Leave blank for continuous rotation
Type of Contacts: N = Non-shorting; S = Shorting
Positions Per Pole: Requires 02 positions as a minimum to maximum allowable dependent on the angle of
throw and poles per deck. Use AJ for adjustable stops (Styles D and UD).
Poles Per Deck: As limited by angle of throw, switch series and style
* All rotary switches that are required to have military designated markings and testing adhering to MIL-3786 are to be ordered by specifying
the military part number identified on the appropriate slash sheet.
ORDERING INFORMATION: Concentric Shaft Rotary Switches
Series: Determined by the angle of throw, applicable to both sections
Style*:
Letter(s)
from the Choices and Limitations chart
Section A (front)
Number of Decks: As limited by the number of poles per deck
Poles Per Deck: As limited by the angle of throw
Positions Per Pole: Requires 02 positions as a minimum to the maximum allowable dependent on the
angle of throw and the poles per deck
Type of Contacts: N=Non-shorting, S=Shorting. All one pole per deck switches with the maximum number
of positions are continuous rotation
43M02110N–M03203S
Section B (rear)
The limitations listed for Section A apply to Section B
Type of Contacts
Positions Per Pole
Poles Per Deck
Number of Decks
Style
* All rotary switches that are required to have military designated markings and testing adhering to MIL-3786 are to be ordered by specifying the military part number identified on the appropriate slash sheet.
Available from your local Grayhill Distributor
For prices and discounts, contact a local Sales Office, an authorized local Distributor or Grayhill.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
Series: Determined by the type of switch and
the angle of throw
Style*: Letter(s) from the Choices and Limitations chart
Angle of Throw: Must agree with Series Number
Number of Decks: As limited by the angle of throw, the poles per deck, switch style and type of contacts
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Keylock Rotary Switches
Series 44l
High Current, 5 Amp
Lock features
• 8-Pin, Round Key Security
• Options for Flat Keys, Special
Keying, and Key Removals
Switch Features
• High, 5 Amp Current Switching
• 45°, Up to 8 Poles Per Switch
• 25,000 Cycles of Operation
• RoHS Compliant
Dimensions
in inches (and millimeters)
DIM. A
SWITCH POSITION 1
(KEY REMOVAL A)
1.575 – .015
(40,0 – 0,38)
B DIA.
H
.283 – .062
(7,19 – 1,57)
.522 – .020
(13,26 – 0,51)
1-3/8-32
UNS-2A
THREAD
15
45
DIM. B
HOLE DIA.
≥ .064 (1,63)
AFTER
PLATING
1
3
7
6
5
4
F
8
1.170 – .015
(29,72 – 0,38)
OVER TERMINALS
C
G
2
D
E
Rotary Switches
1.332 – .002
(33,83 – 0,05)
ACROSS FLATS
No. of decks
LOCK
Note: Switch/key positions are not
aligned with terminal positions.
SWITCH
KNURLED NUT 1.800 (45,72) DIA.;
.281 (7,14) THICK; PIN HOLES
90¡ APART
† 1.950 (49,53) DIA.
LOCKWASHER
1
2
3
4
5
6
Dim. A (In.)
Dim. B (in.)
1.556
.062
1.902
.062
2.248
.062
2.594
.062
2.940
.062
3.536
.312
No. of Decks
Approx. Weight
in Grams
Dim. A (mm)
Dim. B (mm)
39,52
1,57
48,31
1,57
57,10
1,57
65,89
1,57
74,68
1,57
89,81
7,92
Grayhill part number and date code marked on label.
Customer part number marked on request.
recommended Panel cut
1.335 + .010 – .000
(33,91 + 0,25 – 0,00)
1
2
3
4
5
6
123
120
127
144
151
158
Lock Specifications
Keying: Each lock is keyed differently
Key Removal: All positions (45°, etc)
Special Options: Flat key with 90° or 180°
increment key removals; 7 thru 12 decks
.
Lock materials and finishes
Bushing and Knurled Spanner Nut: Aluminum, black anodized
Keying Washer, Cover Support Plate, Shaft
Extension: 302 Stainless steel
Internal and External Lockwashers: Brass,
tin/zinc-plated or stainless steel.
Keys, Cylindrical: Stainless steel; 2 supplied
1.375 + .015 – .000
(34,93 + 0,38 – 0,00)
Choices and limitations
Style
Angle of
Throw
Description
No. Of
Decks
Poles/
Deck
Positions
Per Pole
Shorting or
Non-Shrtg.
01 to 06
01 to 03
01 or 02
01 or 02
1
2
3
4
02 to 08
02 to 04
01 or 02
01 or 02
N or S
N or S
N
N
Series 44 Switches
L
Standard, Solder Lugs
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
45°
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Keylock Rotary Switches
SWITCH Specifications
Electrical Characteristics
Industrial Grade Switch
Switching Current and Life
The load-life values indicate the number of
cycles of operation expected for the voltage,
current and type of load. End of life is defined
using the resistance and breakdown failure
criteria listed below.
5A at
1A at
2A at
115 Vac, resistive
6 to 28 Vdc, resistive
115 Vac, inductive
Cycle of Operation: 360° rotation plus a
360° return
Test Conditions: 25°C, 68% relative humidity,
atmospheric pressure
Life Expectancy:
With loads above: 25,000 cycles
Without load:
100,000 cycles
Mechanical characteristics
Materials and Finishes: Switch
Switching Mode:
45°, 1 or 2 poles: Shorting or non-shorting 45°,
3 or 4 poles: Non-shorting
type of contact: Wiping contacts
contact force: greater than 150g
Number of terminals: Switches are provided
with only the number of terminals needed Stop
Strength: greater than 15 in-lbs (1.70 Nm)
Switching torque: 8-115 in-ozs (28 to 230
mNm), depending on the number of poles,
number of decks, and angle of throw
Switch Bases: Melamine per MIL–M–14, 4
Switch Bases:
Industrial Grade: Melamine per MIL–M–14
Military: Diallyl per MIL–M–14
Cover, Deck Separators, End Plate, and
Rotor Mounting Plate: Phenolic per
MIL–M–14
Shaft, Shaft Extension, Stop Arm, Stop
Washers, Rear Support Plate, Cover
Plate, Retaining Ring, Studs, Nuts: Stainless steel
Detent Balls: Steel, nickel-plated
Detent Springs: Tinned music wire
Rotor Contact, and Stator (Base) Contacts: Silver alloy
Common Plate, and Common Terminal:
Brass, 300µ inch, (7.6 µm) silver plate
Base Terminals: Brass, tin plated
Additional characteristics
Switches of 6 or more decks have longer studs
with extra mounting nuts for recommended
double end mount
Operating Temperature Range: -40 °C to +85 °C
Contact Resistance:
End of life:
less than 20 mΩ
Insulation Resistance:
(Between mutually insulated parts)
Initially:
50,000 MΩ
Breakdown Voltage:
(Between mutually insulated parts)
Initially:
1,000 Vac
End of life:
500 Vac
Rotary Switches
Carry Current: 10A; maximum temperature
rise 20°C
Ordering information
Series
Style Letter: L
Angle of Throw: 45°
Number of Decks: 01 thru 06 (per Choices chart)
Poles per Deck: 1 thru 4 (per Choices chart)
Positions per Pole: 02 thru 08 (per Choices chart)
Type of Contacts:
N = Non-shorting
S = Shorting (per Choices chart)
Stop Arrangement Suffix: (needed only for 1-pole switches
with
maximum positions)
F = Fixed stop between positions 8 and 1
*Leave blank for continuous rotation
44 L 45-02-1-08N-F
Available from your local Grayhill Distributor.
For prices and discounts, contact a local
Sales Office, an authorized local Distributor or
Grayhill.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Adjustable Stop Rotary Switches
Features
• Quick Route to Rotary Switches
• For Prototypes and
Small Production Runs
Series
50/51
Series
42/44
Series
56
Series
71
BEST AVAILABILITY
The Problem
Procurement lead time on rotary switches for
prototypes and small production runs can be long.
This is often a source of headache for design
engineers and production control managers.
Grayhill makes more than 300,000 combinations
of rotary switch styles; number of decks, poles
per deck, positions per pole, military qualified
or commercial grade, etc. This wide variety
makes it impractical for either distributors or
manufacturers to stock completed switches.
Consequently, even small quantities must be
built to order.
The Solution
Grayhill Electronic Distributors can supply a wide
variety of rotary switches with Adjustable Stops.
This feature gives you a switch immediately
with exactly the electrical properties you need.
These Adjustable Stop switches have the basic
mechanical characteristics of their fixed stop
counterparts. To get the right number of positions
per pole for your application, simply adjust the
stop washers or stop pins.
By stocking a few switches, the Distributor
provides over 100,000 possible combinations of
switches. This includes the popular styles, sizes,
angles of throw, number of decks, poles per
deck, positions per pole, and types of contacts.
Availability of these switches through Distributors
speeds prototype development time. There is no
time lag in waiting for factory made samples.
The Substitution
Writing an equivalent part number is easy. To
obtain an adjustable-stop equivalent to a fixedstop rotary switch you must substitute style
letters and possibly series number. Then replace
the positions-per-pole number in the fixed-stop
number with the letters AJ. See the examples
for the scheme.
series, style and angle of throw as well as
the adjustable stop rotary switch series, style
and angle of throw. Then the letters AJ in the
positions-per-pole location, gives you the part
number of the equivalent.
Suppliers
Distributors can supply 1 and 2-deck adjustablestop switches from stock (one or two poles
per deck). They can also quickly secure other
variations from factory stock. Reduce prototype
development time. Use Grayhill Adjustable
Stop Rotary Switches for all of your prototype
requirements.
These electronic distributors also maintain a
representative stock of Grayhill products. Local
availability can often “save the day”, and simplify
your paperwork.
When adjustable equivalents apply, the rotary
switch pages will indicate the substitutions.
A chart will show the fixed stop rotary switch
Fixed Stop Rotary Switch
Adjustable Stop Equivalent
Series
Style
Angle of Throw
No. of Decks
Poles/Deck
Positions/Pole
Type of Contacts
N = Non-Shorting
S = Shorting
42A36-01-1-07N
www.grayhill.com
Series
Style
Angle of Throw
No. of Decks
Poles/Deck
Positions/Pole
Type of Contacts
N = Non-Shorting
S = Shorting
42D36-01-1-AJN
Bulletin 1221
Rev 04/14
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Special Function Rotary Switches
SERIES 09, 42, 44, 50, 51
Isolated Position
FEATURES
• Protected Switch Positions For
Safety, Calibration, or Stand-by
• Choice of Push- or Pull-To-Turn
• 1/2" Diameter, 200 mA and
1" Diameter, 1 Amp Switch
• 10,000 Cycles of Operation
DESCRIPTION
An isolated position is one which cannot be reached by the normal rotation. An additional action is
required by the operator. It could be either Push-To-Turn, or Pull-To-Turn. After the switch is rotated
to the isolated position, releasing the shaft locks the switch in that position. Push or pull again to
rotate the switch again.
Use isolated positions to protect a switch position from indiscriminate rotation. Such safety positions
might include “calibrate”, “off” and/or “stand-by”.
DIMENSIONS
Series 09
Series 42 & 44
Series 50 & 51
DIM. A + .046 (1,17)
–.020 (0,51)
DIM. A
.062 (1,57)
Rotary Switches
DIM. A
DIM. A + .046 –.020
(+ 0,05 –0,51)
SOLDER
LUGS
PC
TERMINALS
Dimension A
1 Deck
2 Decks
3 Decks
4 Decks
1.228
1.496
1.764
2.032
(31,19)
(38,0)
(44,81)
(51,61)
Dimension A
Dimension A
Solder Lug
PC Style
.893 ± .025 (22,68 ± 0,64)
.897 ± .025 (22,78 ± 0,64)
1 Deck
2 Decks
3 Decks
4 Decks
1.371
1.717
2.063
2.409
(34,82)
(43,61)
(52,40)
(61,19)
Grayhill part number and date code marked on label.
Customer number marked on request.
EXTERNAL DIFFERENCES
SPECIFICATIONS
The isolated position mechanism increases the
depth of the Series 50 and 51 by 0.217" (5,51
mm). All other dimensions remain unchanged.
In Series 9, 42 and 44, it has the appearance of
an additional deck section without terminals,
located directly behind the detent system.
Electrical Ratings
Materials and Finishes
The switching elements, and therefore ratings,
are the same in an isolated position switch as in
a conventional rotary switch. Mechanical life is
also the same.
Materials and finishes for the isolation
mechanism are listed here.
Series 50 and 51
Housing: Zinc casting, tin/zinc-plated
Shaft: 303 stainless steel
Stop Pin and Stop Post: 303 stainless steel
Spring: Tinned music wire
Series 09
Housing: Phenolic for style A; Diallyl, for M
Shaft: 303 stainless steel, electro-polished
Stop Pin and Stop Post: 303 stainless steel
Spring: Tinned music wire
Series 42 and 44
Housing: Diallyl per MIL-M-14
Shaft: 303 stainless steel
Lock Plate: 302 stainless steel
Lock Arm: 316 stainless steel
Lock Post: Brass, tin/zinc-plated
Compression Spring: Tinned music wire
Additional Characteristics
Shaft Movement or Vertical Travel:
Series 09
.062 ± .020 (1,57 ± 0,51)
Series 42 & 44
.070 ± .020 (1,78 ± 0,51)
Series 50 & 51
.080 ± .020 (2,03 ± 0,51)
Push or Pull Force Required:
Series 09
1.75 ± .5 lbs
Series 42 & 44
2 ± .5 lbs
Series 50 & 51
2 ± .5 lbs
Stops: Single pole per deck switches with the
maximum number of positions are supplied with
stops only on request: 12 positions in 30° throw,
10 in 36°, and 8 in 45°.
Stop Strength: Approximately 7.5 pound-inches
for the isolated position stop.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Special Function Rotary Switches
CHOICES AND LIMITATIONS
Standard
Style
Military
Style**
Style
Description
Angle Of
Throw
09A
09M
Solder Lug
42A
42S
—
—
42M
—
42H
42HS
Solder Lug
Sealed
125° Temperature Rating
125° Temp Rating, Sealed
Poles Per
Deck
Positions
Per Pole
01 to 04
01 to 04
01 to 04
01 to 04
01 to 04
01 to 03
1
2
3
4
5
6
02 to 12
02 to 06
02 to 04
02 or 03
02
02
N or S
N or S
N or S
N or S
N or S
N or S
01 to 04
01 to 04
1
2
02 to 10
02 to 05
N or S
N or S
01 to 04
01 to 04
01 to 04
01 to 04
01 to 04
01 to 04
1
2
3
4
5
6
02 to 12
02 to 06
02 to 04
02 or 03
02
02
N or S
N or S
N or S
N or S
N or S
N or S
45°
01 to 04
01 to 03
01 or 02
01 or 02
1
2
3
4
02 to 08
02 to 04
02
02
N or S
N or S
N or S
N
36°
01
1
2
02 to 10
02 to 05
N or S
N or S
30°
01
1
2
3
4
02 to 12
02 to 06
02 or 03
02 or 03
N or S
N or S
N or S
N or S
30°
36°
30°
44A
44S
—
—
44M
—
44H
44HS
Solder Lug
Sealed
125° Temperature Rating
125° Temp Rating, Sealed
-----
50C
50CP
50M*
50MP*
Solder Lug
PC Mount
Solder Lug, Sealed
Sealed, PC
-----
51C
51CP
51M*
51MP*
Solder Lug
PC Mount
Solder Lug, Sealed
PC Mount, Sealed
Shorting Or
Non-Shorting
*(Pull-to-Turn only) **For specifics on military qualified products, see Standard Switch Pages.
CONVENTIONAL NUMBERS
Start by creating a conventional switch number
in the manner which follows:
Series & Style
Angle of Throw
Number of Decks
09A30-01-1-12N
Type of Contacts
Shorting = S
Non-Shorting = N
Positions Per Pole
Poles Per Deck
Note: No stop arrangement suffix is needed.
See Describing Stops.
DESCRIBING POSITIONS
The Grayhill system for isolating positions lets
you choose the positions to be isolated. Grayhill
inserts isolation posts next to the positions to be
isolated. Consider a continuous rotation switch
of the Series 09A with a 30° angle of throw. The
terminals are listed here from 1 through 12 with
a space between each to indicate where isolation
posts might be inserted.
12 1 2 3 4 5 6 7 8 9 10 11 12
Let's isolate position 1 and position 2 from all
other positions and from each other. We indicate
isolation posts as shown here:
12P1P2P3 4 5 6 7 8 9 10 11 12
To isolate just position 1, describe like this:
12P1P2 3 4 5 6 7 8 9 10 11 12
To isolate positions 1 and 2 from all other
positions, but not from each other, do this:
12P1 2P3 4 5 6 7 8 9 10 11 12
ORDERING INFORMATION
Indicate this as a SPECIAL switch to ensure
that no error is made when the order is entered.
Sample part number:
SPECIAL
09A30-04-1-12N
PULL 12P1P2P3 4 5 6 7 8 9 10 11 12
DESCRIBING STOPS
When a 1-pole switch has less than the maximum
number of positions, consider also the stop
system. Following is the arrangement for a 6
position switch with the position 1 isolated.
STOP 1P2 3 4 5 6 STOP
The word “STOP” indicates the conventional
switch stops, which limit rotation to positions 1
through 6. To isolate position 1 we insert only
one isolation post–between terminals 1 and 2.
The stop system already prevents rotation
beyond terminal 1.
In multi-pole switches, the stop system and
isolation system described for the first pole,
automatically affects the other poles. In the
example above, isolating position #1 on the first
pole isolates the first position (terminal #7) of
the second pole. See Standard Switch Pages
for a 2 pole circuit diagram for a 30° throw
switch.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
This sample part number orders a Series 9
standard style, four deck, one pole per deck,
twelve positions per pole rotary switch with nonshorting contacts and isolation posts between
positions 12 and 1, between 1 and 2, and
between 2 and 3.
This lengthy order number is required to prevent
any possible confusion in ordering the switch.
When we receive your order, we will assign a
special “short form” part number to facilitate
future identification of this special switch. This
number is sequentially assigned as the need
arises, and is non-descriptive. A typical “short
form” special part number might be 09YY12345.
Contact Grayhill for price.
Not available through Distributors.
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
No. Of
Decks
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Special Function Rotary Switches
SERIES 08,09,42,44,50
Spring Return
FEATURES
• Hold-To-Test, Hold-To-Calibrate,
And Other Momentary Applications
• Choice of Configurations, Ratings,
Styles and Circuitry
• 10,000 Cycles of Operation
DESCRIPTION
A spring return rotary switch has 1 or more momentary positions. Maintaining contact at momentary
positions requires rotational force. Releasing the force allows the mechanism to return the contact
to a normal, or detent, position.
DIMENSIONS
Series 08 & 09
Series 50
Equivalent to Series 50 Standard Switches
.500 ± .015
(12,7 ± 0,38)
DIA.
DIM. A + .046 (1,17)
–.020 (0,51)
DIM. B REF.
STUD PROJECTION
.320 ± .015 (8,13 ± 0,38)
CIRCLE OF CENTERS
COMMON
No. of
Decks
.960
1.228
1.496
1.764
2.032
2.550
(24,38)
(31,19)
(38,0)
(44,81)
(51,61)
(64,77)
Dim
B
.062
.062
.062
.062
.062
.312
Series 42 & 44
DIM. A + .046 (1,17)
–.020 (0,51)
(1,57)
(1,57)
(1,57)
(1,57)
(1,57)
(7,92)
No. of
Decks
1
2
3
For all other dimensions and
specifications, see Standard
Switch pages.
Dim.
A
1.025 (26,04)
1.371 (34,82)
1.717 (43,61)
For all other dimensions and
specifications, see Standard
Switch pages.
CONFIGURATIONS
SELECTING A SWITCH
OPTIONS
This configuration indicates a counterclockwise
force is required to hold the switch at position
#1. “M” indicates a momentary position
counterclockwise of “D” and "D", detented ones.
Positions
1
2
3
M D
D
Releasing this force breaks contact with position
#1 and returns the switch to #2. Normal rotary
switch detent action occurs when the switch is
rotated between position #2 and #3.
1. Select a Configuration: The total number of
positions always includes the 2 basic positions.
A (4) position switch of DDDDM configuration
would have 3 detent positions counterclockwise
of the momentary position.
Watertight panel seal; Multi-pole switches that
exceed the limits noted in the Selector Chart;
Series 50 MD or DM configurations in Military
styles; Series 08, 09, & 44 in MMMDM MM, and
in MMDD MM, and in MMMMMD.
Not available through Distributors
All of the configurations (except MDM) list a
basic 2 position arrangement which is shown in
italics. Example: MDDDDD or DDDDDM. Several
positions can be added during the switch
construction at the factory; but, any configuration
must always contain the 2 basic positions.
2. Select Series, Angle of Throw, and Style:
See the Choices Chart. The basic switch
description, series, and throw are as follows:
1
/2", 1/4 Amp, multi-deck
08 = 36° 09 = 30°
1", 1 Amp, multi-deck
42 = 36° 44 = 30°
1
/2", 200 mA, single deck 50 = 36°
Electrical ratings are the same as those of the
conventional switches with the exception of life.
Life is limited to 10,000 cycles of operation
(25,000 cycles for Series 50) due to the spring
arrangement. Dimensions are the same as for
conventional types except for the shaft flat
orientation of the 3, 4, 5, and 6 pole, Series 09
and 44 in the DDDDDM configuration (see
chart).
3. Select Poles & Positions Per Pole: If you
do not find the poles and positions per pole you
need in one series, try another or contact the
factory. If the behind panel length is a problem,
select a multi-pole type instead of a single deck.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
ORDERING INFORMATION
Create the part number using this example.
Stem number from chart
(4 or 5 digits)
Number of Decks
Number of Poles/Deck
093103-2-045
Type of Contacts:
S=Shorting
N=Non-Shorting
Number of Positions/Pole
Exception: Numbers beginning with 5 are
already complete part numbers.
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary Switches
1
2
3
4
5
6
Dim
A
For all other dimensions and
specifications, see Standard
Switch pages.
36°
± 3°
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Special Function Rotary Switches
CHOICES AND LIMITATIONS
Configuration
Conventional
Switch
08A36
Description
Of
Style
Standard
Spring Return
Stem Number
(See Ordering Info.)
08317
Poles
Per
Deck
Positions Per
Pole & Contact
Type
Location Of
Unique Position,
Detent or Momentary
Term.
Opp.
Flat**
1 to 6
1 to 3
1
2
02 to 05 (N or S)
02 to 05 (N or S)
M5
M 5, 10
5
5
1 to 6
1 to 3
1 or 2
1
1
1
2
3
4
5 or 6
02 to 06 (N or S)
02 to 06 (N or S)
02 to 04 (N or S)
02 or 03 (N or S)
02 (N or S)
M6
M 6, 12
M 4, 8, 12
M 3, 6, 9, 12
M 2, 4, 6, 8, 10, 12
6
6
4
3
2
09A30
Standard
09310
42A36
Standard
42349
1 to 3
1
1
2
02 to 05 (N or S)
02 to 05 (N or S)
M5
M 5, 10
5
5
42M36
Military
42352
1 to 3
1
1
2
02 to 05 (N or S)
02 to 05 (N or S)
M5
M 5, 10
5
5
44A30
Standard
44346
1 to 3
1
1
2
02 to 06 (N or S)
02 to 06 (N or S)
M6
M 6, 12
6
6
44M30
Military
44350
1 to 3
1
1
2
02 to 06 (N or S)
02 to 06 (N or S)
M6
M 6, 12
6
6
08A36
Standard
08319
1 to 6
1 to 3
1
2
02 to 05 (N or S)
02 to 05 (N or S)
M1
M 1, 6
1
1
1
2
3
4
5 or 6
02 to 06 (N or S)
02 to 06 (N or S)
02 to 04 (N or S)
02 or 03 (N or S
02 (N or S)
M1
M 1, 7
M 1, 5, 9
M 1, 4, 7, 10
M 1, 3, 5, 7, 9, 11
1
1
1
1
1
DDDDDM
09A30
Standard
09312
1 to 6
1 to 3
1 or 2
1
1
09M30
Military
09356
1 to 3
1
1
1
2
3
02 to 06 (N or S)
02 to 06 (N or S)
02 to 04 (N or S)
M1
M 1, 7
M 1, 5, 9
1
1
1
42A36
Standard
42350
1 to 3
1
1
2
02 to 05 (N or S)
02 to 05 (N or S)
M1
M 1, 6
1
1
42M36
Military
42353
1 to 3
1
1
2
02 to 05 (N or S)
02 to 05 (N or S)
M1
M 1, 6
1
1
44A30
Standard
44312
1 to 3
1
1
2
02 to 06 (N or S)
02 to 06 (N or S)
M1
M 1, 7
1
1
44M30
Military
44351
1 to 3
1
1
2
02 to 06 (N or S)
02 to 06 (N or S)
M1
M 1, 7
1
1
50A36
Std., Solder Lug
503265-1-03N*
1
1
03N
D2
2
50P36
Std., PC Mount
503267-1-03N*
1
1
03N
D2
2
8A36
Standard
08316
1 to 6
1 to 3
1
2
03 (N or S)
03 (N or S)
D2
D 2, 7
2
2
9A30
Standard
09311
1 to 6
1 to 3
1 or 2
1
1
2
3
4
03 (N or S)
03 (N or S)
03 (N or S)
03 (N or S)
D2
D 2, 8
D 2, 6, 10
D 2, 5, 8, 11
2
2
2
2
42A36
Standard
42348
1 to 3
1
1
2
03 (N or S)
03 (N or S)
D2
D 2, 7
2
2
42M36
Military
42351
1 to 3
1
1
2
03 (N or S)
03 (N or S)
D2
D 2, 7
2
2
44A30
Standard
44345
1 to 3
1
1
2
03 (N or S)
03 (N or S)
D2
D 2, 8
2
2
44M30
Military
44349
1 to 3
1
1
2
03 (N or S)
03 (N or S)
D2
D 2, 8
2
2
MDDDDD
Rotary Switches
MDM
No.
Of
Decks
*This is a complete (not stem) part number.
**Terminal opposite shaft flat when switch
is in its unique (detent or momentary)
position.
Available from your local Grayhill Distributor
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
For prices and discounts, contact a local Sales
Office, an authorized local Distributor, or Grayhill.
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Rotary Switch Engineering Information
Catalog Ratings
Are catalog ratings misleading? In most cases,
yes. Load and life ratings shown in most catalogs
are usually invalid for most applications. This
results from the complex interplay of such factors
as environment, duty cycle, life limiting or failure
criteria, actual load, etc. Circuit designers should
be aware of these factors, and the effect they have
on the useful life of the switch in their applications.
The problem of switch rating arises from the wide
variety of requirements placed on the switch. This
includes various applications, and the sensitivity
of the switch to a change in requirements. If we
attempted to establish life ratings for all possible
applications, we would have an almost infinite
variety of ratings.
To simplify the problem, switch manufacturers,
switch users, and the military, have established
certain references for ratings. These include
loads, life requirements, environments, duty
cycles, and failure criteria. These references
are arbitrarily established. But, they allow you to
compare different switch designs. They do not,
however, match the actual requirements for most
applications.
The curves shown here are an example of some
of the life load curves. These curves are life load
characteristics of the Grayhill 42M and 44M
switches. Note that the curves consider only two
voltage sources and two types of loads. These
voltages and loads are, however, considered as
standards for testing procedures by the industry.
Curve data is based on tests conducted at
sea level, 25°C and 68% relative humidity.
Cycle = 360° rotation and return. Cycling rate
is 10 cycles per minute. Switch rating is for
non-shorting contacts.
CURRENT (AMPS)
7
6
5
VOLTAGE 115 VAC
RESISTIVE
4
3
2
1
0
0
10
25
50
CYCLES x 1,000
CURRENT (AMPS)
1.7
1.5
VOLTAGE 30 VDC
RESISTIVE
1.2
1.0
.75
INDUCTIVE
(2.8 HENRIES)
.50
.20
0
0
10
25
50
CYCLES x 1,000
www.grayhill.com
These curves allow you to predict the expected life
of the switch once you know the voltage, current
and type of load. Also note that each cycle is
approximately a 360° rotation and a return. For a
ten position switch this would be a rotation from
position 1 to position 10 and back to 1. This cycle
runs approximately ten times a minute. Thus testing
causes more electrical and mechanical wear than
what the switch incurs in actual use.
Summary
The life and load ratings in this and other catalogs
are probably not totally valid for your application.
The bright side of the picture is that in most
applications the switch will perform better than its
ratings. This is because the standard industry test
conditions are more stringent than those found in
most applications.
This difference can be very dramatic. For example,
Grayhill’s 42A and 44A Series Rotary Switches, are
rated at 1 ampere (115 Vac resistive). However,
they will operate at 5 amperes in many applications.
To see how some major factors influence switch
performance, read on.
USEFUL LIFE CRITERIA
The “useful” life of a switch in your application
depends on what you demand of it. This includes
parameters such as contact resistance, insulation
resistance, torque, detent feel, dielectric strength,
and many other factors. For example, a contact
resistance of 50 milliohms may be totally unusable
in certain applications such as a range switch in a
micro-ohm meter. In other applications a contact
resistance of 5 ohms may be perfectly satisfactory.
In establishing “useful” life for a switch in your
application, you must first determine “failure
criteria,” or “end of life” parameters. At what level
of contact resistance, dielectric strength, etc., is the
switch no longer acceptable for your application?
Most switches are acceptable on all parameters
when new. There is a gradual deterioration in
performance with life. The rate of deterioration
varies greatly with basic switch design. Often,
circuit designers select a switch on the basis of
its performance when new. This is a mistake.
The performance of the switch after several
years of equipment use is more significant. To
estimate this, first determine the life limiting or
failure criteria for your application. In most uses,
important life-limiting (failure) criteria include the
following parameters:
Contact Resistance
Insulation Resistance
Dielectric Strength
Actuating Force
Contact Resistance
This is the resistance of a pair of closed contacts.
This resistance effectively appears in series with
the load. Typical values are in the range of a few
milliohms for new switches. These values usually
increase during life. The rate of increase is greatly
affected by the voltage, current, power factor,
frequency, and environment of the load being
switched. Typical industry standard “end of life”
criteria for this parameter are:
MIL-DTL-3786:
MIL-S-6807:
MIL-S-8805:
MIL-S-83504:
20 milliohms
(Rotary Switches)
20 milliohms
(Snap Pushbuttons)
40 milliohms
(Pushbuttons)
100 milliohms
(DIP Switches)
Contact resistance can be measured by a number
of different methods. All of them are valid depending
upon the switch application and the circuit.
Grayhill uses the method in applicable military
specifications. This method specifies an open
circuit test voltage and a test current. The voltage
drop across the closed contacts is measured. The
contact resistance is determined by Ohm’s Law
from the test current and the measure voltage
drop. MIL-DTL-3786, MIL-S-6807 and MIL-S-8805
require a maximum open circuit test voltage of 2
Vdc; they require a test current of 100 milliamperes.
MIL-S-83504 requires a maximum test voltage of
50 millivolts and a test current of 10 milliamperes.
When a switch is rated to make and break 5 or more
amperes, there is a difference. Contact resistance
is determined by measuring the voltage drop while
the switch is carrying the maximum rated current.
The voltage drop that occurs across the contacts
determines, in part, the contact temperature. If
the temperature rise of the contacts is sufficient,
it affects contact material. A chemical reaction
will take place that can cause an insulating film
to appear on the contacts. This film is present
between the contacts during the next switching
operation. This film formation can cause failure
due to increasing contact resistance. For switching
of very low voltages and currents, this resistance
may be the failure criteria.
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Insulation Resistance
This is the resistance between two normally
insulated metal parts, such as a pair of terminals.
It is measured at a specific high DC potential,
usually 100 Vdc or 500 Vdc. Typical values for
new switches are in the range of thousands of
megohms. These values usually decrease during
switch life. This is a result of build-up of surface
contaminants. Typical industry standard “end of
life” criteria for the parameter are:
MIL-DTL-3786:
MIL-S-6807:
MIL-S-8805:
MIL-S-83504:
1000 megohms
(for plastic insulation)
Not specified
2000 megohms
1000 megohms
Another special test condition is commonly
specified. It measures insulation resistance for
switches in a high humidity atmosphere (90%-98%
R.H.). In this condition, condensation of moisture
commonly occurs on the surface of the insulating
material. Some types of insulation will absorb
varying amounts of moisture. This will normally
lower the insulation resistance. Typical industry
values for this condition are:
MIL-DTL-3786:
MIL-S-6807:
MIL-S-8805:
MIL-S-83504:
10 megohms
(for plastic insulation)
3 megohms after
drying
10 megohms
(for plastic material)
10 megohms
Dielectric Strength
This is the ability of the insulation to withstand
high voltage without breaking down. Typical
values for new switches in this test are in excess
of 1500 Vac RMS. During switch life, contaminants
and wear products deposit on the surface of the
insulation. This tends to reduce the dielectric
withstanding voltage. In testing for this condition,
a voltage considerably above rated voltage is
applied. Then, the leakage current is measured
at the end of life. Typical industry standard test
voltages and maximum allowable leakage currents
are as follows:
MIL-DTL-3786:
1000 Vac and 1 mA
maximum leakage
MIL-S-6807:
600 Vac RMS after life
10 microamperes
maximum leakage
MIL-S-8805:
1000 or 1000 plus
twice working voltage
(AC) RMS and 1mA
maximum leakage
MIL-S-83504:
500 Vac and 1 mA
maximum leakage
UL Standard:
900 Vac without
breakdown (UL
Standard (dependent
on test)
Voltage breakdown is another method for
www.grayhill.com
describing the ability of the insulating material
to withstand a high voltage. Voltage breakdown
describes the point at which an arc is struck and
maintained across the insulating surface with the
voltage applied between the conducting members.
ADDITIONAL LIFE FACTORS
Effect of Loads
On any switch, an arc is drawn while breaking a
circuit. This causes electrical erosion of the contacts.
This erosion normally increases contact resistance
and generates wear products. These wear products
contaminate insulating surfaces. This reduces
dielectric strength and insulation resistance.
The amount of this erosion is a function of current,
voltage, power factor, frequency and speed of
operation. The higher the current is, the hotter
the arc and the greater the erosion. The higher
the voltage is, the longer the arc duration and the
greater the erosion.
Inductance acts as an energy storage device. This
returns its energy to the circuit when the circuit
is broken. The amount of erosion in an inductive
circuit is proportionate to the amount of inductance.
Industry standard test inductance as described in
MIL-I-81023 is 140 millihenries. Other test loads
include 250 millihenries and 2.8 henries.
Effect of Ambient Temperature
Temperature extremes may affect switch
performance and life. Very high temperatures
may reduce the viscosity of lubricants. This allows
them to flow out of bearing areas. This can hasten
mechanical wear of shafts, detents, plungers, and
cause early mechanical failure. Contact lubricants
are sometimes used. Too little lubrication can
result in a high rate of mechanical wear. Too much
lubrication flowing from other bearing areas can
adversely affect dielectric strength and insulation
resistance.
Through careful design and selection of lubricants
most manufacturers attempt to minimize these
affects. Nevertheless, continual operation in high
ambient temperatures will shorten the life of a
switch regardless of design.
Extremely low ambient temperatures may also
create problems. Low temperatures may cause an
increase in the viscosity of the contact lubricant.
Higher viscosity can delay or prevent the closing
of contacts, causing high operating contact
resistance. Under certain atmospheric conditions,
ice may form on the contact surfaces. This also
causes high and erratic contact resistance.
Frequency can also affect erosion. The arcing
ends when the voltage passes through zero. To
a certain extent, the following is true. The higher
the frequency, the sooner arcing ends, the lower
the erosion.
Neither of these conditions may materially
reduce the life of the switch. However, it may
cause unsatisfactory operation. If the voltage of
the circuit is high enough, it can break down the
insulating layer. Some current will flow through the
high resistance contacts. A local heating action is
created, which tends to correct the condition in a
short period of time.
The speed of operation affects the duration of the
arc. Fast operation can extinguish the arc sooner.
This reduces the erosion, unless the air within the
switch is completely ionized.
Switches with high contact pressures may minimize
the low ambient temperature effect. This is
particularly true if the application calls for switching
signal level voltages and currents.
Actuating Force
Effects of Altitude
Rotational torque is the actuating force required to
turn a rotary switch through the various positions.
The actual torque or force required depends on
the design of the switch. It varies widely from one
design to another. See appropriate MIL Specs or
manufacturers literature for typical industry values
for specific designs.
When torque or force values are specified, it
is customary to give a minimum and maximum
value. During life, two offsetting factors may occur
to change the initial value. Relaxation of spring
members will tend to lower torque or force values.
Wear or “galling” of mating surfaces, however,
may tend to increase these values. Typical end
of life specifications may require the switch to fall
within the original range. Or, they may specify a
maximum percentage change from original value.
For example, “the rotational torque shall not change
more than 50% from its initial value.
In high altitudes, barometric pressure is lower. Low
pressure reduces the dielectric strength of the air.
The arc strikes at a lower voltage and remains
longer. This increases contact erosion. Switches
for use in high altitudes will therefore require derating in terms of loads and/or life.
Effects of Duty Cycle
Mechanical life testers cause accelerated life
testing. Testers operate switches at a rate of
approximately 10 cycles per minute. This rate is
greatly in excess of normal manual operation in
equipment. It constitutes a severe test of the switch.
Lubricants do not have an opportunity to redistribute
themselves over the bearing surfaces at this duty
cycle. The contact heating caused by arcing does
not have a chance to dissipate.
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Thus, the switch runs “hot”, increased mechanical
wear and contact erosion result. Your application
probably requires manual operation of the switch
with an attendant low duty cycle. If so, you can
usually expect much longer switch life than is
shown by the accelerated life laboratory life tests.
Conclusion
Remember, load and life ratings are based
on manufacturers’ selected references. They
include accelerated life tests and an arbitrary
set of application parameters and failure criteria.
These parameters and criteria may not always
fit your application.
Then how do you know if a switch will give reliable
performance in your application?
How do you know if it will last the life of your
equipment?
Ask the switch manufacturer. Grayhill, and most
other reputable manufacturers have compiled
vast quantities of test data. We are in a position
to give a good estimate of a switch’s performance
in many nonstandard applications. You should
provide the following data:
Expected Life:
Load:
Operation:
Application:
Environment:
Failure Criteria:
in number of cycles
voltage, current, power
factor, and frequency
manual or mechanical, duty
cycle
type of equipment
altitude,
ambient
temperature range
relative humidity, corrosive
atmosphere, shock,
vibration, etc.
end of life contact
resistance, dielectric
strength, insulation
resistance, etc.
With this information, we can usually estimate
if a given switch is suitable for your application.
www.grayhill.com
Soldering
What causes failure in a new switch after it
has been installed? The principle failure is high
contact resistance caused by solder flux on the
contact surfaces. To avoid this, be sure to follow
good soldering practices. Use the proper solder
with the proper flux core, maintain the proper
soldering temperature, use the proper soldering
iron tip for the work, and never use liquid flux
when soldering a switch.
initially and 10.0 ohm maximum dc resistance
following environmental and mechanical tests.
Many equipment manufacturers feel they are
satisfying their needs with a measurement of .025
to 10 ohms for the expected life of the switch.
Under most circumstances, standard non-sealed
switches pass the larger value easily. The lower
value (.025 ohms) requires special attention and
parts for compliance over the life of the switch.
Do not use solvent baths or washes with any
unsealed electromechanical parts. Switches,
unless they have been especially protected suffer
badly. Solvents readily dissolve fluxes and carry
them into the contact area of switches. A thin, hard
flux coats the contact surface after the solvent
evaporates. Additionally, solvents may dissolve
and wash away lubricants in switches. Lubricant
loss may prevent proper mechanical action.
Switch Selection
Exercise similar precautions when you mount a
switch to a printed circuit board. Maintain proper
solder temperatures and follow proper cleaning
techniques. Avoid subjecting these switches to
lengthy solder baths. The excessive heat can
deform the plastics.
RFI/EMI Shielding
Some applications require shielding against Radio
Frequency Interference and/or Electro-Magnetic
Interference. Experts feel that the most effective
way to achieve shielding is to provide a conductive
bridge across the component mounting hole.
They also generally agree that there is no good
method for testing shielding. So, the equipment
manufacturers themselves must identify and solve
specific problems. Component manufacturers
can generally assist in the solution of shielding
problems.
RFI/EMI testing is incorporated into MILDTL-3786 for rotary switches. Requirements
are 1.0 ohm maximum dc resistance between
the mounting bushing and operating shaft
Whenever possible, use standard switches and
contact configurations. Standards provide the
greatest economy and the best delivery. When
you need a deviation, it pays to consult with your
suppliers as soon as possible. At the early stages
of the design, there are many low cost options
for achieving the results. At the late stages of
design, some of the options may no longer be
open. For example, size may be restricted. This
might result in a more costly redesign.
Typical standard rotary options are as follows:
coded contacts, homing rotor effect, progressively
shorting contacts, PC mountable terminals, rotary
switch spring return positions, and push-to-turn
or pull-to-turn mechanisms.
Limited panel space may be solved by a concentric
shaft rotary switch. It is two rotary switches,
located one behind the other. There are other
concentric shaft possibilities. A rotary switch can
be combined with another component. These
include a potentiometer, a pushbutton switch, and
a mechanical element. The most cost effective
design may be one of these concentric options.
But, selection must be made at the outset of
equipment design.
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
1. SELECT A FACTOR
FACTOR: Current Life Rating
All switches are rated to make and break at least 100 milliamperes for 10,000 cycles of operation. Rating becomes a matter of interpretation. Carefully
review the Engineering Information on the previous pages. Ratings which assure a different life are possible; contact Grayhill.
25,000 Cycles At Load (Amps)
10,000 Cycles At Load (Amps)
6,000 Cycles At Load (Amps, UL)
19
Single Deck Switch Series Multi-Deck Switch Series
24 50/51 56 75 77 5000 08/09 42/44 43/54 53,57,59 71
—
—
15
1
—
—
.050
.200
—
—
.200
—
—
.100
—
.050
—
—
1
—
—
.250
.500
—
1,3,5*
1,3,5*
—
1,3,5*
1,3,5*
—
—
.250
.150, .250* —
—
—
* Varies with angle of throw and style.
FACTOR: Size
Maximum Dimension
Single Deck Switch Series
Multi-Deck Switch Series
In Inches (& Millimeters) 19 24 50 51 56 75 77 5000 08 09 42 44 53 57 59 71
Diameter, Behind Panel
2.280 1.015 .500 .561 .500 .298
1.015 .687 .750 1.015 1.170 1.350 1.190 1.190 .750
Length Behind Panel, 1 Deck .950 .580 .698 .698 .355 .500
.470 .960 .960 1.025 1.025 .916 .916 .916 .760
Behind Panel, Add'l Deck
— — — — — — — — .268 .268 .346 .346 .329 .326 .326 .218
Diameter, Behind Panel
(57,9) (25,8) (12,7) (14,2) (12,7) (7,6)
Length Behind Panel, 1 Deck (24,1) (14,7) (17,7) (17,7) (9,0) (12,7)
Behind Panel, Add'l Deck
— — — — — —
() (25,8) (17,4) (19,0) (25,8) (29,7) (34,3) (30,2) (30,2) (19,0)
() (11,9) (24,4) (24,4) (26,0) (26,0) (23,3) (23,3) (23,3) (19,3)
— — (6,8) (6,8) (8,8) (8,8) (8,4) (8,3) (8,3) (5,5)
* If multi-deck switch is needed, contact Grayhill.
FACTOR: Circuitry
Max. Positions
1 Deck (1Pole)*
Angle Of
Throw
Maximum
Decks**
Maximum Poles
Per Deck***
Shorting Or
Non-Shorting
15°
18°
22°30'
22°30'
12
12
12
1
12
10
8
2
N or S
N or S
N or S
N or S
Solder
Solder
Solder
Both
53
59
57
51
12
12
12
12
12
11
30°
30°
30°
30°
30°
30°
12
12
12
1
1
1
6
6
6
4
4
1
N or S
N or S
N or S
N or S
N or S
N
Both
Both
Solder
Both
Both
****
71
9
44
51
56
19
10
10
10
10
10
10
10
10
36°
36°
36°
36°
36°
36°
36°
36°
12
12
12
1
1
1
1
1
2
2
2
2
2
2
1
1
N or S
N or S
N or S
N
N or S
N or S
N or S
N or S
Both
Both
Both
PC
Both
Both
Both
Solder
8
71
42
75/77
50
56
24
5000
8
8
8
6
6
6
4
4
4
45°
45°
45°
60°
60°
60°
90°
90°
90°
12
12
1
6
12
1
12
6
1
4
4
2
3
3
2
2
2
2
N or S
N or S
N
N
N
N
N
N
N
Both
Solder
Both
Both
Solder
Both
Solder
Both
Both
9
44
50
9
44
50
44
9
50
24
20
16
16
* Maximum positions per pole depends
on number of poles per deck.
www.grayhill.com
** Based on 1 pole per deck. Number of decks
is also limited by the total number of poles.
Solder Lug
Or PC
Series
Number
*** Limited by total number of poles per switch.
****Choice of Faston or Solder Lug terminals.
Bulletin 1220
Rev 04/14
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
Rotary Switch Standard Options
• Custom Switches With No
Tooling Required
• Easily Ordered Specials
1. Dummy Terminal
Used as tie point, it is not an active switch
position. Can be located at any specified position outside of active switch terminals. Priced
as active position. Example, a three position
switch with 2 dummy terminals would be
priced as a five position switch.
.072 +.000 –.002
(1,83 –0,05)
.034 ± .003
(0,86 ± 0,07)
.045
.047 (1,19)
(1,14)
.096 ± .001
(2,44 ± 0,03)
2. Enlarged Wire Holes
.032 ± .001
(0,81 ± 0,03)
R (2)
5. Notched Terminals
Used in place of the conventional solder lug
terminals.
6. External Shorting Links
.068 ± .005
(1,73 ± 0,13)
.045
(1,14)
Series 08A, 09A, 42H, 42M, 44H, and 44M:
Lug terminals for several wires; standard in Series
08M, 09M, 53, 57, and 59 switches.
3. High Density Wiring Terminal
.096 ± .001
(2,44 ± 0,03)
.0635 + .002 –.001
(1,61 + 0,05 – 0,02)
DIAMETER
The gold-plated terminal features a slot to accept
wires in addition to the conventional wire hole.
4. Taper Tab Terminals
.095 (2,41)
.280 (7,11)
45°
.062 ± .003
(1,57 ± 0,08)
DIAMETER
External shorting links, as shown in the drawing,
can be used in place of conventional solder
lug terminals in the Series 5000, 24, 42 or 43
rotary switches. Shorted terminals can also be
accomplished internally in the Series 71 rotary
switches. Solder lug terminals can be intermixed
on the same deck.
7. Non-Standard, Non-Turn
Devices
Switches without tabs
Series 08, 09, 42 and 44: There is no additional
charge for a front support plate without a nonturn tab.
Non-turn tab of non-standard projection
Series 08:
All tabs located at .260 inch radius from centerline of switch. The following projections
(inches) are available: .121; .094; .045; .032
Series 44:
From Centerline
Projection
.375" (9,53 mm) .062" (1,57 mm)
.531" (13,49 mm) .121" or .049"
(3,07 or 1,24 mm)
8. RFI Grounding
A silver-plated shaft and wave washer improve
DC grounding of shaft to mounting bushing, thus
minimizing possible radio frequency interference. Example: static and dynamic DC resistance after 25,000 cycle life test is maximum
100 milliohms. For concentric shaft switches,
discuss grounding with factory. Special handling
charges apply to small lots.
9. Electrostatic, Electromagnetic
Shielding
A metallic shield can be added between decks.
Grounding of the shield provides additional RFV
/EMI protection, Size and shape of the shield
depends on the equipment configuration and the
amount of protection required Price is dependant onthe number and type of shields required.
10. Unidirectional Rotation
The detenting system permits rotation in only one
direction. Usable only with continuous rotation
switches. Specify direction of rotation. Applicable
to 30° and 36° throw switches only.
Switch
Options For Styles A and S
Options For All Styles
Series# 1 2 3 4 5 6 7 8 9 10
11
12
13
14
15
16
.079 (2,01)
Used in place of conventional solder lug terminals.
Taper tab terminals are gold plated.
08 x x x
x x x
09 x x x
x x x
24 x x x x x x
42 x x* x x x x x x x x x x
43 x x x x x x* x x x
44 x x* x x x x x x x x x
50/51 x x
56 x x
53/57/59 x
54 x x x x x* x x x x x
71 x*
x x
5000 x x x x x x
* See description below for limitations.
www.grayhill.com
Patent Pending
©2013
Specifications are subject to change. Please refer to the current datasheet on www.grayhill.com for the most current published specifications for this product.
11. Intermixing of Shorting and NonShorting Contacts
In some switches, non-shorting and shorting
contacts can be intermixed between decks. A
2-deck switch, for example could have shorting
contacts on deck 1 and non-shorting contacts
on deck 2. In a few switches, non-shorting
and shorting contacts can also be intermixed
between poles. A 2-pole per deck switch, for
example, could have non-shorting on pole #1,
and shorting on pole #2.
Series 08 and 09:
An 09M30 or 08M36 rotary switch can have
shorting and non-shorting contacts intermixed
between decks. Shorting and non-shorting
contacts can be intermixed between poles as
well as decks in styles A, S, P, and SP.
Example: an 08P36, 1-pole, 10 position switch
with terminals on one side of the switch would
be priced as a 2 deck, five position, one pole
per deck switch.
13. Homing Rotor (Bridging and
Shorting Deck) and Progressively
Shorting Deck
A homing rotor (bridging and shorting) switch
deck connects all terminals to the common except
the terminal in the selected switch position. For
example, in position 1, terminals 2 thru 12 are
CIRCUIT
DIAGRAM
Series 50, 51, and 56:
Non-shorting and shorting contacts can be
intermixed between poles.
Priced the same as standard switches. The
type of contacts on each pole must be precisely
indicated.
12. PC Mount Switches With
Terminals From One Side
of Switch
Series 71 PC mount switch has all terminals
on one side.
Series 08P, 09P, and 42P with non-shorting
contacts are also available with terminals limited
to one side. Contact Grayhill for a special part
number. This is accomplished by using 2 decks
per pole and placing the rotating contacts 180°
out of phase on each deck. The first deck picks
up the first half of the positions; the second
deck picks up the last half of the positions.
Common terminals are tied together by the PC
board circuitry.
A total of 12 decks (6 usable poles) is the
maximum per switch. Switches with the
maximum number of positions (12 for 30°,
or 10 for 36°) will have continuous rotation.
Rotation can be limited to less than the maximum
positions. For example, an 8 position Series 8P36
switch with terminals on one side, would pick
up 5 positions on the first deck and 3 positions
on the second deck.
Price is the same as standard switches with
comparable number of decks and positions.
www.grayhill.com
C
12
HOMING
ROTOR DECK
1
2
11
Series 42, 43, 44, and 54, in 30° or 36°:
Non-shorting and shorting contacts can be
intermixed between poles or decks.
Series 71:
Non-shorting and shorting contacts can be
intermixed between poles in fixed stop switches
only.
decks are used in combination with conventional
decks, it is important to remember that the stop
system limits the rotation of both types of decks.
For example, when a homing rotor deck Is used
in combination with a 6-position conventional
deck, the homing rotor is likewise limited to six
positions.
O-RINGS
10
3
9
4
5
8
6
7
connected to the common, and terminal 1 is
open. In position 2, terminal 3 thru 12 and 1 are
connected to the common, and terminal 2 is
open. A homing rotor deck will function for 25,000
mechanical cycles of operation.
The progressively shorting switch deck connects
consecutive switch positions to the common. For
example, in position 1, terminal 1 is connected
to the common; in position 2, terminals 1 and
2 are connected to the common; in position
CIRCUIT
DIAGRAM
C
PROGRESSIVELY
SHORTING DECK
1
2
14. Shaft and Panel Seal on
Concentric Shaft Switches
The following diagram shows the location of
the O-rings required to seal the shafts to the
bushings. When the concentric shaft switches
are sealed in this manner, the .125 inch diameter
shaft is supplied full round. Bushing-to-panel
sealing is accomplished by the panel seal kit.
15. Fixed Stop, Add-A-Pot
Switches
The rotary switch section of the Add-A-Pot rotary
switches can be built with a fixed mechanism
rather than the standard adjustable stop
mechanism. The front end of a switch of this type
is similar to the Series 43A or Series 54A style
concentric rotary switches. The total number of
decks is limited to three. The Series 43 is limited
to 1 pole per deck. Series 54 to 2 poles per deck.
3
4
5
6
3, terminals 1,2, and 3 are connected to the
common. A progressively shorting deck is limited
to a maximum of 6 positions. A progressively
shorting deck will function for 25,000 mechanical
cycles of operation.
16. Series 54 Concentric Shaft
Switch in 45°, 60°, and 90°
Throws
The Series 54A switch is available with these
angles of throw in Section A of the concentric
rotary switch. Section B is available in 30° angle
of throw only. Section A is limited to 1 to 3 decks,
non-shorting contacts, and 1 or 2 poles per deck.
Homing Rotor or Progressively Shorting decks
can be ordered as a deck of a 44A or 44M style
switch, or their sealed equivalents. Order up to
11 conventional decks and 1 special circuitry
deck. For a good detent feel, the switch is limited
to a total of 12 poles plus the homing rotor or
progressively shorting deck. Example: 6 2-pole
decks and a homing rotor. When these special
Bulletin 1222
Rev 04/14
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