Single Deck Rotary Switches
SERIES 50 SERIES 51
0.5" Diameter, 200mA,
.698" Behind Panel
FEATURES
• Optional Complete Seal for
PC Board Assembly and Cleaning
• Small 1/2" Diameter
• Choice of 22.5°, 30°, 36°, 45°, 60°
and 90° Angles of Throw
• Up to 4 Poles on 1 Deck
• Up to 16 Positions Per Switch
• PC or Solder Lug Termination
• Positive Shaft Grounding for
EMI/RFI Shielding
DIMENSIONS
In inches (and millimeters)
PC Mount Style
.250±.015
(6,35±0,38)
.203 ± .003
(5,16 ± 0,08)
ACROSS
FLATS
DIMENSION "B"
.375±.015
(9,53±0,38)
Side View
All others as shown at left
.125±.015
(3,18±0,38)
.171 ± .015
(4,34 ± 0,38)
.250±.015
(6,35±0,38)
.125 (3,18)
REF.
DIMENSION
D
POS. 1
Rotary Switches
OPTIONAL
PANEL SEAL
GASKET
Ø.125 +.001- .002
(3,18 + 0,03 -0,05)
.125 ± .015
(3,18 ± 0,38)
Angle of
Throw
Angle
A
45°
60°
90°
112.5°
120°
135°
101.25°
105°
108°
Dimension
Series 50
D
.500 ± .015
(12,70 ± 0,38)
Series 51
.562 ± .015
(14,27 ± 0,38)
Solder Lug Style
.658±.015
(16,71±0,38)
.375±.015
(9,53±0,38)
Ø .025 ± .002
(0,64 ± 0,05)
.062 ± .003
(1,57 ± 0,08)
Dimension
B
Style T
.576 ± .015
(14,63 ± 0,38)
All Others
All 22.5°
.537 ± .015
(13,64 ± 0,38)
.537 ± .015
(13,64 ± 0,38)
.064 ± .005
(1,63 ± 0,13)
.020 ± .004
(0,51 ± 0,10)
.234±.015
(5,94±0,38)
.250±.015
(6,35±0,38)
2 1 10 9
GRAYHILL
.153±.015
(3,89±0,38)
Ø.125 + .001 - .002
(3,18 + 0,03 - 0,05)
Rotary
4
PC COMMON DETAIL
All angles of throw, except 22.5°
SOLDER LUG TERMINAL DETAIL
All angles of throw, except 22.5°
.250±.015
(6,35±0,38)
Front view same as
PC Mount style.
TERMINAL SEALANT
IN STYLE T
.171 ± .015
(4,34 ± 0,38)
.020 ± .004
(0,51 ± 0,10)
.020 ± .003
(0,51 ± 0,08)
22.5°
30°
36°
TERMINAL
SEALANT
IN STYLE "T"
PC TERMINAL DETAIL
All angles of throw, except 22.5°
Grayhill part number and date code
marked on label. Customer part
number marked on request. Military
part number marked when required.
Angle
A
COMMON Ø .025 ± .002
(0,64 ± 0,06) AND EXTEND
TO SAME PLANE AS
POSITION TERMINALS
1/4-28 UNF-2A
THREAD
.093 ± .005
(2,36 ± 0,13)
Angle of
Throw
TERMINALS ARE
.016 ± .003 (0,41 ± 0,08) SQ.
2 1 10 9
GRAYHILL
A
1/4-28 UNF-2A
THREAD
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
.032 ± .004
(0,81 ± 0,10)
.062 ± .004
(1,57 ± 0,10)
SOLDER LUG TERMINAL DETAIL 22.5°
.064 ± .005
(1,63 ± 0,13)
.016 ± .004
(0,41 ± 0,10)
TERMINAL
SEALANT
IN STYLE "T"
.021 ± .004
(0,53 ± 0,10)
.046 ± .004
(1,17 ± 0,10)
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Single Deck Rotary Switches
CIRCUIT DIAGRAMS AND REAR VIEWS: Solder Lug and PC Mount
Rear View
.156 ± .015
(3,96 ± 0,13)
11.25˚
POS. 1
22.5˚
Circuit as Viewed From Shaft End
PC MOUNT
SOLDER LUG
COMMON TERMINAL
(1 POLE)
.382 ± .015 (9,70 ± 0,13)
DIAMETER CIRCLE OF
TERMINAL CENTERS
.500 ± .015
(12,7 ± 0,13)
DIA. CIRCLE
OF CENTERS
11.25˚
POS. 1
22.5˚
LOCATION
OF COMMONS
2 POLES
.156 ± .015
(3,96 ± 0,13)
8
1
C1
9
9
7
6
1
6
POLE 1
POLE 1
FOUR POLES
THREE POLES
Dimension A, diameter circle of common centers,
is .175 (4,45) for Solder Lug and .232 (5,89) for PC.
6
12
C1
1
4
.125 ± .015
(3,18 ± 0,38)
5
1
10
1
C1
5
4
2
36° Angle
of Throw
2
3
TWO POLES
7
7
6
8
1
4
5
8
C2
C1
4
2
3
9
C2
6
ONE POLE
LOCATION OF COMMONS
2 POLES
45˚
FOUR POLES
3
6
3
8
5
.125 ± .015
(3,18 ± 0,38)
2
4
7
10
COMMON TERMINAL (1 POLE)
.320 ± .015 (8,13 ± 0,38) DIAMETER
CIRCLE OF TERMINAL CENTERS
1
C1
9
4
22.5˚
POS. 1
6
5
6
LOCATION OF COMMONS
2 POLES
36˚
C2
1
45° Angle
of Throw
2
3
TWO POLES
ONE POLE
COMMON TERMINAL (1 POLE)
.320 ± .015 (8,13 ± 0,38) DIAMETER
CIRCLE OF TERMINAL CENTERS
5
5
6
4
4
6
C2
.125 ± .015
(3,18 ± 0,38)
30˚
C1
1
3
POS. 1
LOCATION OF COMMONS
2 POLES
60˚
1
3
2
2
ONE POLE
TWO POLES
60° Angle
of Throw
COMMON TERMINAL (1 POLE)
LOCATION OF COMMONS
2 POLES
.320 ± .015 (8,13 ± 0,38)
DIAMETER CIRCLE OF
TERMINAL CENTERS
3
4
3
4
C2
.125 ± .015
(3,18 ± 0,38)
45˚
2
1
ONE POLE
POS. 1
90° Angle
of Throw
C1
2
1
TWO POLES
90˚
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary
5
Rotary Switches
8
7
12
C4
THREE POLES
.320 ± .015 (8,13 ± 0,38) DIAMETER
CIRCLE OF TERMINAL CENTERS
11
C3
7
3
30° Angle
of Throw
10
8
C3
2
5
3
9
11
COMMON TERMINAL (1 POLE)
18˚
POS. 1
4
TWO POLES
10
C2
1
2
5
3
7
12
C1
2
8
POS. 1
11
C2
ONE POLE
.175 ± .005
(4,45 ± 0,13)
DIAMETER
CIRCLE OF
COMMON
CENTERS
10
8
12
4
3
5 4
TWO POLES
7
9
DIM. A ±
.005 (0,13)
6
11
LOCATION OF COMMONS
2 POLES
22.5° Angle
of Throw
2
7
10
5
POS. 1
1
ONE POLE
POS. 1
30˚
15
16
8
3
5 4
14
10
9
2
7
6
12 13
11
15
16
8
.156 ± .005 (3,96 ± 0,13)
15˚
14
C2
LOCATION
OF COMMONS
2 POLES
COMMON TERMINAL
(1 POLE)
COMMON TERMINAL (1 POLE)
.382 ± .005 (9,70 ± 0,13)
DIAMETER CIRCLE OF
TERMINAL CENTERS
12 13
11
10
9
Single Deck Rotary Switches
SPECIFICATIONS
Military Qualification
The dimensions for qualified switches are
the same as those indicated in the drawings
of standard switches. Switches with standard
variations, such as shaft and bushing length,
which do not affect switch performance, can be
marked as qualified product. Contact Grayhill
for complete information on variations.
36°, 45°, 60°, 90° (Series 50): The C and M
style switches are qualified to MIL‑S‑3786/20.
They include the following:
Solder lug or PC terminals
With or without panel seal
Series 50 qualified switches may be ordered
by the ‘M’ number or by the Grayhill part
number.
30° (Series 51): The C and M style switches
are qualified to MIL‑S‑3786/35. They include
the following:
Solder lug or PC terminals
With or without panel seal
Series 51 qualified switches may be ordered
by the ‘M’ number or by the Grayhill part
number.
Electrical Ratings
Contact Resistance: 20 milliohms maximum,
(10 milliohms initially).
Insulation Resistance: 1,000 Mohms
minimum between mutually insulated parts.
Voltage Breakdown: 600 Vac minimum
between mutually insulated parts at standard
atmospheric pressure.
Life Expectancy: Listed for the voltage source
and make and break current levels. Contact
Grayhill for more information if any of the
following is true: the life limiting criteria are
more critical than those listed; longer operation
is required; a larger make and break current is
required; the operating environment includes
elevated temperatures or reduced pressures.
Contact Carry Rating: Switch will carry
6 amperes continuously with a maximum
contact temperature rise of 20°C.
Life Expectancy: With the limiting criteria stated
here, the Series 50 and 51 with non-shorting
contacts will switch the following loads at
atmospheric and reduced pressures for 25,000
cycles of operations. One cycle is 360° rotation
clockwise and 360° return.
At 85°C, atmospheric pressure
200 mA,
28 Vdc resistive
150 mA, 115 Vac resistive
30 mA,
28 Vdc inductive
100 mA, 28 Vdc lamp load
75 mA, 220 Vac lamp load
At 25°C, reduced pressure (70,000 feet)
200 mA,
28 Vdc resistive
150 mA, 115 Vac resistive
75 mA, 220 Vac resistive
SPECIFICATIONS: Other
Rotary Switches
Additional Characteristics
Contact Type and Forces: Shorting or nonshorting wiping contacts with over 80 grams
of contact force.
Shaft Flat Orientation: Flat opposite contacting
position of pole number one (see circuit
diagrams).
Terminals: Switches have the full circle of
terminals, regardless of number of active
position.
Stop Strength: 7.5 pound-inches minimum
Rotational Torque: 8–24 ounce-inches,
depending on the number of poles.
Process Sealed–Style T
Materials and Finishes
1/4" SHAFT: Style K
Switch can be mounted on PC board with other
components and subjected to wave soldering
and conventional board cleaning techniques. No
secondary wiring or soldering is necessary.
.250
±.015
.219
±.004
Bushing is o-ring sealed; epoxy potting seals the
terminals and the rear of the switch. Designed
for PC assembly, this sealing technique can also
be applied to solder lug terminal switches. A
bushing to panel seal can also be added to the
process sealed versions. Military qualified ver‑
sions are available, see ordering information.
.250 +.002
-.001
.250
±.015
.340
±.005
0.208
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
3/8-32 UNEF-2A
THREAD
.375
±.015
1/8"Shaft
CIRCLE SHOWING
DIMENSIONS OF
HOLE TO BE CUT
IN PANEL.
Rotary
6
Panel Seal: Silicone rubber
Shaft Seal: Fluorosilicone
Mounting Nuts: Brass, tin-zinc plated
Mounting Hardware: One mounting nut .089"
thick by .375" across flats and one internal tooth
lockwasher are supplied with the switch.
Maximum Mounting Torque: 15in-lbs
Switch Base: Thermoset
Detent Rotor: Nylon
Shaft, Stop Blades, Stop Arm, Thrust washer,
and Retaining Ring: Stainless steel
Detent Balls: Steel, nickel-plated
Bushing: Zinc, tin-zinc plated
Detent and Contact Springs: Stainless steel
Common Ring: Brass, gold-plated over silver
plate.
Terminals: Brass, gold-plated over silver plate
and nickel plate
Rotor Contact: Precious metal alloy, goldplated
Ø0.254
POS. 1
"E" Style
Ø0.280
"K"
"K"Style
Style
Ø0.380
Ø0.380
POS. 1
1
POS.POS.
1
0.240
0.350
0.350
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Single Deck Rotary Switches
SUGGESTED ADJUSTABLE STOP
SUBSTITUTION GUIDE
Fixed
Stop
Style
Adj. Stop
Style
Equivalent
Fixed
Stop
Style
Adj. Stop
Style
Equivalent
50A
50C
50CP
50M
50MP
50P
50S
50SP
50D
50CD
50CDP
50CD*
50CDP*
50DP
50D*
50DP*
51A
51C
51CP
51M
51MP
51P
51S
51SP
51D
51CD
51CDP
51CD*
51CDP*
51DP
51D*
51DP*
ADJUSTABLE STOPS: Style D
Adjustable stops permit the user to set and
reset the number of positions per poles. Shown
in the diagram, a plastic washer can be removed
to reveal slots at the base of the bushing. Stop
blades can be inserted into the appropriate slots
to limit switch rotation. Positions per pole
configuration can thus be changed to meet the
needs of the application. Dimensions are the
same as the fixed stop version, when plastic
washer is in place. Most desirable for prototype
work. Readily available from local distributor.
*Form fit and function equivalents, but not watertight sealed to
the panel.
Stop
Blade
Slots
Plastic
Washer
Stop
Blades
ACCESSORY: Non-Turn Washers
In Inches (and millimeters)
SHAFT AND PANEL SEAL: Styles S and M
Shaft and panel seal switches
are watertight to the panel. They
are not totally process sealed
like the Style “T”. Panel is sealed
by a gasket at the base of the
bushing. Shaft is sealed by an
O-ring inside the bushing. After
mounting, seals do not alter
switch dimensions. See Style
“S” (standard switches) and
Style “M” (military switches) in
the Choices and Limitations
chart.
SEAL
.400
± .005
DIA.
(10,16
± 0,13)
.025
± .001
(0,64
± 0,03)
90° ± 1°
.250 ± .003
(6,35 ± 0,08)
.015
(0,38)
RADIUS
MAX.
.125
± .005
(3,16
± 0,13)
.060 ± .001
(1,52 ± 0,25)
Part No. 50J1066
Cut round hole for the bushing and for the
non-turn tab. Washer fits the double D
bushing flats. Washer is sold only when
accompanied by an order for a like number
of switches. Washer is 302 stainless steel.
Dimensions are in millimeters
Form, fit and function equivalent to standard shaft switches.
The dimensions shown have
evolved as the most popular for
this type of switch. See Style “B”
in the Choices and Limitations
chart. Previous users may have
ordered these switches by a
non-descriptive part number
containing a “Y”. Contact
Grayhill, if in doubt about a
cross-reference.
.125±.015
(3,18±0,38)
.032±.005
(0,81±0,13)
"A"
.050±.005
(1,27±0,13)
METRIC SHAFT AND BUSHING: Style E
9,53
±0,38
6,0±0,08
"A"
3,15
±0,12
6,35
±0,38)
4,0
±0,03
7,0
±0,51
M7 x 0,75
Metric standard dimensions for
the shaft and bushing are shown
in the drawing. Other dimensions
approximately the same as
shown in dimensional drawing.
Contact Grayhill for exact
dimensions. See Style “E” in
the Choices and Limitations
chart.
11,13
± 0,13
DIA.
0,64
± 0,05
90˚ ± 1˚
.015
(0,38)
RADIUS
MAX.
CL
5,08
± 0,05
2,36
± 0,13
1,57 ± 0,08
Part No. 71J1103
Designed to fit the double flatted bushing
of the metric dimensioned bushing, this
non-turn washer permits a round hole for
the bushing and the tab while still preventing switch rotation. Washer is only sold
when accompanied by a like number of
switches. Washer is 302 stainless steel.
0.032
0.375
0.125
0.187
Part No. 50J5140-4
Designed to fit the single flatted bushing of
the "K" style switches, this non-turn washer
prevents switch rotation when using a full
round hole in the panel. Washer is only sold
when accompanied by a like number of
switches. Washer is 302 stainless steel.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary
7
Rotary Switches
SCREWDRIVER SLOTTED SHAFT: Style B
Single Deck Rotary Switches
CHOICES AND LIMITATIONS: Series 50
A = Standard, 1/8" Shaft
B = Screwdriver Slot Shaft
C = Military, Without Panel Seal
D = Adjustable Stop (Adj. Stop)
P = PC Mount Terminals
S = Shaft/Panel Seal (S/P Seal)
T = Process Sealed
E = Metric, 4mm Shaft
K = 1/4" Shaft
M = Military
Standard Style
Series
Std., 1/8" Shaft
Style Choices1
1/4" Shaft
A
AT
B
BS
BST
BT
D
S
ST
K
KS
KST
KT
KB
KBS
KBST
KT
BP
BPT
BSP
BSPT
DP
P
PT
SP
SPT
KP
KPT
KSP
KSPT
KBP
KBSP
KBSPT
KBT
Metric, 4mm Shaft
E
ES
EST
ET
EB
EBS
EBST
EBT
Terminals
Solder
Lug
Angle
of
Throw
Number
of
Poles
36°
1
2
02 thru 10
02 thru 05
N or S
N or S
45°
1
2
02 thru 08
02 thru 04
N
N
60°
1
2
02 thru 06
02 or 03
N
N
90°
1
2
02 thru 04
02
N
N
36°
1
2
02 thru 10
02 thru 05
N or S
N or S
45°
1
2
02 thru 08
02 thru 04
N
N
60°
1
2
02 thru 06
02 or 03
N
N
90°
1
2
02 thru 04
02
N
N
Angle
of
Throw
Number
of
Poles
36°
1
2
02 thru 10
02 thru 05
N or S
N or S
45°
1
2
02 thru 08
02 thru 04
N
N
60°
1
2
02 thru 06
02 or 03
N
N
90°
1
2
02 thru 04
02
N
N
36°
1
2
02 thru 10
02 thru 05
N or S
N or S
45°
1
2
02 thru 08
02 thru 04
N
N
60°
1
2
02 thru 06
02 or 03
N
N
90°
1
2
02 thru 04
02
N
N
50
EP
EPT
ESP
ESPT
EBP
EBSP
KBSPT
EBT
PC Mount
Number of
Positions
Per Pole
Shorting or
Non-Shorting
Contacts
Rotary Switches
Military Style
Series
Std., 1/8" Shaft
C
CB
CBT
CD
CT
M
MB
MBT
MT
Style Choices
1/4" Shaft
KM
KMB
KMBT
KMT
Metric, 4mm Shaft
EM
EMB
EMBT
EMT
Terminals
Solder
Lug
50
CBP
CBPT
CDP
CP
CPT
MBP
MBPT
MP
MPT
Rotary
8
KMBP
KMBPT
KMP
KMPT
EMBP
EMBPT
EMP
EMPT
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
PC Mount
Number of
Positions
Per Pole
Shorting or
Non-Shorting
Contacts
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Single Deck Rotary Switches
CHOICES AND LIMITATIONS: Series 51
A = Standard, 1/8" Shaft
B = Screwdriver Slot Shaft
C = Military, Without Panel Seal
D = Adjustable Stop (Adj. Stop)
P = PC Mount Terminals
S = Shaft/Panel Seal (S/P Seal)
T = Process Sealed
E = Metric, 4mm Shaft
K = 1/4" Shaft
M = Military
Standard Style
Series
Std., 1/8" Shaft
A
B
S
BS
51
AT
BT
ST
BST
A
AT
B
BS
BST
BT
D
S
ST
P
BP
SP
BSP
PT
BPT
SPT
BSPT
Metric, 4mm Shaft1
SEE BELOW
SEE BELOW
K
KS
KST
KT
E
ES
EST
ET
SEE BELOW
SEE BELOW
KP
KPT
KSP
KSPT
EP
EPT
ESP
ESPT
Terminals
Angle
of
Throw
Number
of
Poles
Number of
Positions
Per Pole
Shorting or
Non-Shorting
Contacts
Solder
Lug
22.5°
1
2
02 thru 16
02 thru 08
N or S
N or S
30°
1
2
3
4
02 thru 12
02 thru 06
02 thru 04
02 or 03
N or S
N or S
N or S
N or S
1
2
02 thru 16
02 thru 08
N or S
N or S
02 thru 12
02 thru 06
02 thru 04
02 or 03
N or S
N or S
N or S
N or S
Solder
Lug
PC Mount
22.5°
Rotary Switches
BP
BPT
BSP
BSPT
DP
P
PT
SP
SPT
Style Choices1
1/4" Shaft
PC Mount
30°
1
2
3
4
Terminals
Angle
of
Throw
Number
of
Poles
Number of
Positions
Per Pole
Shorting or
Non-Shorting
Contacts
30°
1
2
3
4
02 thru 12
02 thru 06
02 thru 04
02 or 03
N or S
N or S
N or S
N or S
30°
1
2
3
4
02 thru 12
02 thru 06
02 thru 04
02 or 03
N or S
N or S
N or S
N or S
Military Style
Series
Std., 1/8" Shaft
Style Choices
1/4" Shaft
Metric, 4mm Shaft
C
CB
CBT
CD
CT
M
MB
MBT
MT
KM
KMB
KMBT
KMT
EM
EMB
EMBT
EMT
CBP
CBPT
CDP
CP
CPT
MBP
MBPT
MP
MPT
KMBP
KMBPT
KMP
KMPT
EMBP
EMBPT
EMP
EMPT
Solder
Lug
51
1
PC Mount
Contact Grayhill if 1/4" or metric shaft required with a 22.5° angle of throw.
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
Rotary
9
Single Deck Rotary Switches
ADDITIONAL FEATURES
Economy keylock switch, isolated position,
spring return, and coded switches are available
in similar series. See Keylock and Special
Function Rotary Switch sections.
Available from your local Grayhill Distributor.
For prices and discounts, contact a local Sales
Office, an authorized local Distributor, or Grayhill.
ORDERING INFORMATION: Series 50
Series: Series 50 (36°, 45°, 60°, or 90°)
Style*: Letters from Choices Chart
Angle of Throw: 36, 45, 60, or 90
50AT36–01–1–10N–F
Stop Arrangement: Needed only with 1 pole switches with
maximum positions. Leave blank for continuous rotation;
add F for fixed stop.
Type of Contacts: N = Non-shorting, S = Shorting
Positions Per Pole: 02 as a minimum to the maximum allowable
for the angle of throw and the number of poles per the Choices Chart.
Use Letters AJ in this location if adjustable stop switch is ordered.
Poles per Deck: See chart
Number of Decks: 01 only
* 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.
Rotary Switches
ORDERING INFORMATION: Series 51
Series: Series 51 (30°; 22.5°)
Style*: Letters from Choices Chart
Angle of Throw: Use 22 (for 22.5°), 30
51SPT30–01–1–12S–F
Stop Arrangement: Needed only with 1 pole switches with
maximum positions. Leave blank for continuous rotation;
add F for fixed stop.
Type of Contacts: N = Non-shorting, S = Shorting
Positions Per Pole: 02 as a minimum to the maximum allowable
for the angle of throw and the number of poles per the Choices Chart.
Use Letters AJ in this location if adjustable stop switch is ordered.
Poles per Deck: See chart
Number of Decks: 01 only
* 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.
Rotary
10
Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois
60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com
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