7274

MODELS 7274, 7276 7/8” Diameter Plastic 10–Turn Wirewound Precision Potentiometer MODEL STYLES 2 7274 7276 ELECTRICAL 6mm Shaft, 3/8” Bushing 1/4” Shaft, 3/8” Bushing Resistance Range, Ohms Standard Resistance Tolerance Independent Linearity Power Rating, Watts Dielectric Strength Insulation Resistance, Minimum Noise, Maximum Actual Electrical Travel Tap Tolerance End Voltage, Maximum (% of input voltage) ENVIRONMENTAL (MIL-R-12934) 100 to 100K ±5% ±0.25% 2.0 at 25°C derating to 0 at 105°C 1,000V rms 1,000 Megohms 100 Ohms 3600° + 10° – 0° ±3° 0.25% Operating Temperature Range Temperature Cycling Shock, 6ms Sawtooth Vibration Moisture Resistance High Temperature Exposure Rotational Load Life Specifications subject to change without notice. –25°C to +105°C 5 cycles, –25°C to +105°C (5% ∆R) 100G’s (0.1ms discontinuity max.) 10G’s, 10 to 500 Hz (5% ∆R, 0.1ms discontinuity max.) Five 24 hour cycles (3% ∆R) 1,000 hours at 105°C (5% ∆R) 500K shaft rev. + 900 hrs. at rated wattage at 25°C (5%∆R) 2-93 Model 7274, 7276 MECHANICAL Total Mechanical Travel Number of Gangs, Maximum Weight, Nominal Static Stop Strength, Maximum Backlash, Maximum Panel Nut Tightening Torque, Maximum Shaft End Play, Maximum Shaft Radial Play, Maximum Start/Run Torque, Maximum STANDARD RESISTANCE VALUES, OHMS 3600° + 15° – 0° 1 0.42 oz. 60 oz.-in. 2° 8 lb.-in. .010” .010” 1.5 oz.-in. Total Resistance 100 200 500 1K 2K 5K 10K 20K 50K 100K Theoretical Resolution (% Nominal) 0.059 0.037 0.030 0.024 0.020 0.018 0.017 0.016 0.010 0.009 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 ±20 ppm/°C ±20 ppm/°C 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 2-94 Model 7274, 7276 OUTLINE DIMENSIONS (Inch/mm) .750±.040 19.1±1.02 Mounting Surface Dim. A Slider CCW CW .812±.031 20.6±0.79 Adjustment Slot: .047±.005/1.19±0.13 Wide X +.015 +0.38 .063 -.000/1.60 -0.00 Deep X .195±.015/4.95±0.38 Long 2 .404±.002 Dia. 10.3±0.05 75° Max. .625 R Max. 15.9 +.000 .062 -.010 +0.00 1.58 -0.25 Anti-Rotation Pin .060±.005/1.52±0.13 Dia. on .290±.005/7.37±0.13 Radius. Extends .040±.010/1.02±0.25 From Mounting Surface 3/8 - 32 UNEF Thread .312±.016 7.93±0.41 7274 +.0000 Dim. .2362 -.0020 A Dia. +0.00 6.00 -0.05 7276 .249±.001 Dia. 6.33±0.03 .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 2-95 Model 7274, 7276 SPECIAL FEATURES Center Tap Linearity Tape Flatted Shaft Shaft Lock Gold Plated Solder Lug Terminals (see optional terminal configuration) ORDERING INFORMATION CT LT FS SL FT 7276 R 10K L .25 Model Series Resistance Prefix Linearity Resistance Value MATCHING TURNS COUNTING DIALS 2606, 2606S, 2607, 2607S, 2626, 2627, 2646, 2646S, 2647, 2647S, 2126, RB 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 2-96 Model 7274, 7276