7/8" Diameter 10-Turn Wirewound Precision Potentiometer MODEL STY

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7/8" Diameter 10-Turn Wirewound Precision Potentiometer MODEL STY

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MODEL 7280 SERIES
7/8" Diameter 10-Turn Wirewound Precision Potentiometer
MODEL STYLES
7281 7283 7284 7286
ELECTRICAL
1/8" Shaft, 1/4" Bushing 1/8" Shaft, Servo Shaft, 3/8" Bushing 1/4" Shaft, 3/8" Bushing
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 Tolerance Voltage, Maximum
Specifications subject change without notice.
100K ±0.25% ±0.15%, Ohms ±0.075%, Ohms 70°C derating 125°C 1,000V 1,000 Megohms Ohms 3600° Ohms 3600° Ohms 0.25% input voltage
2-97
Model 7280 Series
ENVIRONMENTAL (MIL-R-12934)
Operating Temperature Range Temperature Cycling Shock, Sawtooth Vibration Moisture Resistance High Temperature Exposure Rotational Load Life
MECHANICAL
Static: -55°C +125°C Dynamic: -40°C +125°C cycles, -55°C +125°C 100G's (0.1ms discontinuity max.) 15G's, 2,000 0.1ms discontinuity max.) Five hour cycles 1,000 hours 125°C mil. shaft rev. hrs. rated wattage 70°C
Total Mechanical Travel Number Gangs, Maximum Weight, Nominal (single gang) Backlash, Maximum Static Stop Strength Panel Tightening Torque, Maximum Shaft 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
7281, 7284, 7286 oz.-in. lb.-in. .010" .003" .004" .005" .003" oz.-in.
3600° 0.75 7283 oz.-in. .005" .002" .002" .004" .002" oz.-in.
Total Resistance 100K
Theoretical Resolution Nominal) 0.059 0.037 0.030 0.024 0.020 0.018 0.017 0.016 0.010 0.008
Tempco Wire ppm/°C ppm/°C ppm/°C ppm/°C ppm/°C ppm/°C ppm/°C ppm/°C ppm/°C ppm/°C
2-98
Model 7280 Series
OUTLINE DIMENSIONS (Inch/mm) Dim. 7281 .688 .031 17.475 0.787 +0.0000 .1248 -0.0003 Mounting Surface .281 Dim. 3.1699 +0.0000 -0.0076 +0.000 -0.002 7284 .812 .031 20.625 0.787 +0.0000 .2362 -0.0005 6.0000 .406 Dia. 10.312 +0.0000 -0.0127 +0.000 -0.002 +0.000 -0.051 7286 .812 .031 20.625 0.787 +0.0000 .2500 -0.0005 6.3500 .406 Dia. 10.312 +0.0000 -0.0127 +0.000 -0.002 +0.000 -0.051
Models 7281, 7284 7286 Bushing Mount with Sleeve Bearing
Dia.
Dia.
Dia.
Dia.
1.125±.031 28.58±0.79 .750±.016 19.1±0.41 Slider
+0.000 7.137 -0.051
.125 Min. 3.18
UNEF Thread
UNEF Thread Max.
UNEF Thread .625 Max. 15.9
Dim. Dim.
.080±.001 Dia. .062 +.000 2.03±0.03 -.010 +0.00 1.58 -0.25
Chamfer .016/0.41 Max. Dim. .312±.016 7.93±0.41
.875±.016 Dia. 22.2±0.41
Slot: .032±.005/0.813±0.127 Wide Deep (Not Rear Shaft Models)
OPTIONAL TERMINAL CONFIGURATION
VIEW SLIDER .625 15.9
.110 2.794 .020 Thickness .060 .003 Dia. 1.524 .076 .062 .003 1.524 .076
Special Feature Code "FT" order. Enlarged View
2-99
Model 7280 Series
OUTLINE DIMENSIONS (Inch/mm)
Model 7283 Servo Mount with Ball Bearing
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 .057 Min. 1.45 .062±.005 1.58±0.13 Chamfer .016/0.406 Max. .062±.005 1.58±0.13
1.250±.031 31.75±0.79 .875±.016 22.2±0.41 .250 6.35 Min.
.625 Max. 15.9 105° Max.
Clamp Ears
Slider
.080±.001 Dia. 2.03±0.03 .875±.016 22.2±0.41 Housing Dia.
+.005 .875 -.010 +0.13 Dia. 22.2 -0.25
Clamp .922 Dia. Max. 23.4
OPTIONAL TERMINAL CONFIGURATION
105° VIEW SLIDER .625 15.9
.110 2.794 .020 Thickness .060 .003 Dia. 1.524 .076 .062 .003 1.524 .076
Enlarged View Special Feature Code "FT" order.
METRIC CONVERSIONS
25.4 28.4
oz.-in. lb.-in.
0,007 0,113
2-100
Model 7280 Series
SPECIAL FEATURES
Center Linearity Tape Rear Shaft Extension (7283, 7286 single only) Flatted Shaft Slotted Shaft (Standard single 7286 without Shaft Lock (7281, 7286 only) High Torque, oz.-in. (7286 only) Additional Gangs Gold Plated Solder Terminals (See Optional Terminal Configuration)
ORDERING INFORMATION
7286 Model Series Resistance Prefix Resistance Value Optional Special Feature Code Linearity Optional Non-Standard Tolerance
MATCHING TURNS COUNTING DIALS
7281: RBJ, 2601, 2641 7286: 2606, 2607, 2626, 2627, 2646, 2647, 2126, 2606S, 2607S, 2646S, 2647S,
CIRCUIT DIAGRAM
NOTES
(CCW) (CW)
Metric equivalents, based inch 25.4mm rounded same number significant figures original English units provided general information only. Tolerances unless otherwise specified: Linear inches (.25mm) Angular degrees
INCH
2-101
Model 7280 Series

7/8" Diameter 10-Turn Wirewound Precision Potentiometer MODEL STY

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