MODEL 7380 SERIES
7/8” Diameter 3–Turn Wirewound Precision Potentiometer
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MODEL STYLES
7381 7383 7386 7388 (for heavy side load applications) NEW PRODUCT
1/8” Shaft, 1/4” Bushing 1/8” Shaft, Servo 1/4” Shaft, 3/8” Bushing 1/4” Shaft, 3/8” Bushing
ELECTRICAL
Resistance Range, Ohms Standard Resistance Tolerance Minimum Practical Resistance Tolerance Independent Linearity Minimum Practical Independent Linearity Power Rating, Watts Dielectric Strength Insulation Resistance, Minimum Noise, Maximum Actual Electrical Travel Tap Tolerance End Voltage, Maximum
Specifications subject to change without notice.
100 to 30K ±5% ±1% ±0.30% ( 100 Ohms 1080° + 10° – 5°, ≤ 100 Ohms ±3° 0.25% of input voltage
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Model 7380 Series
ENVIRONMENTAL (MIL-R-12934)
Operating Temperature Range Temperature Cycling Shock, 6ms Sawtooth Vibration Moisture Resistance High Temperature Exposure Rotational Load Life Rotational Life Model 7388 (1 pound Side Load)
MECHANICAL
Static: –55°C to +125°C Dynamic: –40°C to +125°C 5 cycles, –55°C to +125°C (5% ∆R) 100G’s (0.1ms discontinuity max.) 15G’s, 10 to 2,000 Hz (5% ∆R, 0.1ms discontinuity max.) Five 24 hour cycles (3% ∆R) 1,000 hours at 125°C (5% ∆R) 300K shaft rev. + 900 hrs. at rated wattage at 70°C (5% ∆R) 300K shaft rev. + 900 hrs. at rated wattage at 70°C (5% ∆R)
Total Mechanical Travel Number of Gangs, Maximum Weight, Nominal (single gang) Backlash, Maximum Static Stop Strength Panel Nut Tightening Torque, Maximum Shaft End Play, Maximum Shaft Runout, T.I.R., Maximum Pilot Diameter Runout, T.I.R., Maximum Lateral Runout, T.I.R., Maximum Shaft Radial Play, Maximum Start/Run Torque, Maximum (per gang)
STANDARD RESISTANCE VALUES, OHMS
7381, 7386 60 oz.-in. 25 lb.-in. .010” .003” .004” .005” .003” 1.2 oz.-in.
1080° + 15° – 0° 2 0.75 oz. 1° 7383 36 oz.-in. N/A .005” .002” .002” .004” .002” 0.9 oz.-in.
Total Resistance 100 200 500 1K 2K 5K 10K 20K
Theoretical Resolution (% Nominal) 0.059 0.037 0.030 0.024 0.020 0.018 0.017 0.016
Tempco of Wire ±20 ppm/°C ±20 ppm/°C ±20 ppm/°C ±20 ppm/°C ±20 ppm/°C ±20 ppm/°C ±20 ppm/°C ±20 ppm/°C
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Model 7380 Series
OUTLINE DIMENSIONS (Inch/mm)
Models 7381 & 7386 Bushing Mount with Sleeve Bearing
Dim. A
7381 .688±.013 17.475±0.787 +.0000 -.0003 Dia. +0.0000 3.1699 -0.0076 .1248 +.000 -.002 Dia. +0.000 7.137 -0.051 .281 1/4-32 UNEF Thread
7386 .812±.031 20.625±0.787 +.0000 -.0005 Dia. +0.0000 6.3500 -0.0127 .2500 +.000 -.002 Dia. +0.000 10.312 -0.051 .406 3/8-32 UNEF Thread
B
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C 1.125±.031 28.58±0.79 .750±.016 19.1±0.41 Slider CCW CW Mounting Surface Dim. A .125 Min. 3.18 Dim. B Dim. C D
75° Max.
.625 R Max. 15.9
.080±.001 Dia. 2.03±0.03
Slot: .032±.005/0.813±0.127 Wide X .032+.010-.000/0.813+0.254-0.000 Deep (Not on Rear Shaft Models) +.000 -.010 +0.00 1.58 -0.25 .062 Chamfer Dim. D .016/0.41 Max. x 45° .312±.016 7.93±0.41 .875±.016 Dia. 22.2±0.41
OPTIONAL TERMINAL CONFIGURATION
40° VIEW B SLIDER .625 R MAX 15.9 R MAX
.110 2.794 .020 Thickness .060 ± .003 Dia. 1.524 ± .076 .062 ± .003 1.524 ± .076
Use Special Feature Code “FT” to order.
Enlarged View B
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Model 7380 Series
OUTLINE DIMENSIONS (Inch/mm)
Model 7383 Servo Mount with Ball Bearing
1.250±.031 31.75±0.79 .875±.016 22.2±0.41 .250 CCW 6.35 CW Min.
Mounting Surface .375±.031 9.53±0.79 .781 Dia. Max. 19.8 +.0000 .1248 -.0003 Dia. +0.0000 3.1699 -0.0076 +.000 -.001 +0.000 Dia. 15.875 -0.025 .625
.625 R. Max. 15.9
Clamp Ears 105° Max.
Slider
.080±.001 Dia. 2.03±0.03 .875±.016 22.2±0.41 Housing Dia. .057 Min. 1.45 .062±.005 1.58±0.13 .062±.005 1.58±0.13
+.005 .875 -.010 +0.13 Dia. 22.2 -0.25 Clamp .922 Dia. Max. 23.4
Chamfer .016/0.406 Max. x 45°
OPTIONAL TERMINAL CONFIGURATION
105° MAX 40° VIEW B SLIDER .625 R MAX 15.9 R MAX
.110 2.794 .020 Thickness .060 ± .003 Dia. 1.524 ± .076 .062 ± .003 1.524 ± .076
Use Special Feature Code “FT” to order.
Enlarged View B
METRIC CONVERSIONS
1 in. 1 oz.
25.4 mm 28.4 gm
1 oz.-in. 1 lb.-in.
0,007 N-m 0,113 N-m
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Model 7380 Series
SPECIAL FEATURES
Center Tap Linearity Tape Rear Shaft Extension Flatted Shaft Slotted Shaft (Standard on single cup 7386 without RS) Shaft Lock (7381, 7386 only) High Torque, 2–6 oz.-in. (7386 only) Additional Gangs Gold Plated Solder Lug Terminals (See optional terminal configuration)
ORDERING INFORMATION
CT LT RS FS SS SL HT 2G FT
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7386 R 10K T2 L .50 XX Model Series Resistance Prefix Resistance Value Optional Special Feature Code Linearity Optional Non-Standard Tolerance
MATCHING TURNS COUNTING DIALS
7381: RBJ, 2601, 2641 7386: RB, 2126, 2606, 2606S, 2607, 2607S, 2626, 2627, 2646, 2646S, 2647, 2647S
CIRCUIT DIAGRAM
NOTES
(S) (CCW) (CW)
Metric equivalents, based on 1 inch = 25.4mm are rounded to the same number of significant figures as in the original English units and are provided for general information only. Tolerances unless otherwise specified: Linear = ± .01 inches (.25mm) Angular = ± 2 degrees
INCH mm
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Model 7380 Series
