MODEL 7480 SERIES 7/8” Diameter 5–Turn Wirewound 2 Precision Potentiometer MODEL STYLES 7481 7483 7486 7488 (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 100 to 50K ±5% ±1% ±0.25% ±0.25%, < 500 Ohms ±0.20%, ≥ 500 Ohms 1.5 at 70°C derating to 0 at 125°C 1,000V rms 1,000 Megohms 100 Ohms 1080° + 10° – 0°, > 100 Ohms 1080° + 10° – 5°, ≤ 100 Ohms ±3° 0.25% of input voltage Power Rating, Watts Dielectric Strength Insulation Resistance, Minimum Noise, Maximum Actual Electrical Travel Tap Tolerance End Voltage, Maximum ENVIRONMENTAL (MIL-R-12934) Operating Temperature Range Thermal Shock Shock, 6ms Sawtooth Vibration Moisture Resistance High Temperature Exposure Rotational Load Life Rotational Life Model 7488 (1 pound Side Load) 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) 500K shaft rev. + 900 hrs. at rated wattage at 70°C (5% ∆R) 500K shaft rev. + 900 hrs. at rated wattage at 70°C (5% ∆R) Specifications subject to change without notice. 2-109 Model 7480 Series MECHANICAL Total Mechanical Travel Number of Gangs, Maximum Weight, Nominal (single gang) Backlash, Maximum 7481, 7486 60 oz.-in. 25 lb.-in. .010” .003” .004” .005” .003” 1.2 oz.-in. 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) 1800° + 15° – 0° 2 0.75 oz. 1° 7483 36 oz.-in. N/A .005” .002” .002” .004” .002” 0.9 oz.-in. STANDARD RESISTANCE VALUES, OHMS Total Resistance Theoretical Resolution (% Nominal) Tempco of Wire 100 200 500 1K 2K 5K 10K 20K 0.059 0.037 0.030 0.024 0.020 0.018 0.017 0.016 ±20 ppm/°C ±20 ppm/°C ±20 ppm/°C ±20 ppm/°C ±20 ppm/°C ±20 ppm/°C ±20 ppm/°C ±20 ppm/°C 2-110 Model 7480 Series OUTLINE DIMENSIONS (Inch/mm) Models 7481 & 7486 Bushing Mount with Sleeve Bearing Dim. 7481 7486 A .688±.013 17.475±0.787 .812±.031 20.625±0.787 B +.0000 -.0003 Dia. +0.0000 3.1699 -0.0076 +.0000 -.0005 Dia. +0.0000 6.3500 -0.0127 C +.000 -.002 Dia. +0.000 7.137 -0.051 +.000 -.002 Dia. +0.000 10.312 -0.051 D 1/4-32 UNEF Thread 3/8-32 UNEF Thread .1248 .281 1.125±.031 28.58±0.79 .750±.016 19.1±0.41 Slider CCW CW .080±.001 Dia. 2.03±0.03 +.000 -.010 +0.00 1.58 -0.25 Mounting Surface .2500 .406 Dim. A .125 Min. 3.18 Dim. B 75° Max. Dim. C .875±.016 Dia. 22.2±0.41 Chamfer .062 .625 R Max. 15.9 Dim. D .016/0.41 Max. x 45° .312±.016 7.93±0.41 Slot: .032±.005/0.813±0.127 Wide X .032+.010-.000/0.813+0.254-0.000 Deep (Not on Rear Shaft Models) OPTIONAL TERMINAL CONFIGURATION 40° .110 2.794 VIEW B SLIDER .625 R MAX 15.9 R MAX .020 Thickness .060 ± .003 Dia. 1.524 ± .076 .062 ± .003 1.524 ± .076 Use Special Feature Code “FT” to order. Enlarged View B 2-111 Model 7480 Series 2 OUTLINE DIMENSIONS (Inch/mm) Model 7483 Servo Mount with Ball Bearing Mounting Surface 1.250±.031 31.75±0.79 .375±.031 9.53±0.79 .781 Dia. Max. 19.8 +.0000 .1248 -.0003 Dia. +0.0000 3.1699 -0.0076 .875±.016 22.2±0.41 .250 CCW 6.35 CW Min. Slider +.000 -.001 +0.000 Dia. 15.875 -0.025 .625 .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 Clamp Ears .625 R. Max. 15.9 105° Max. +.005 .875 -.010 +0.13 Dia. 22.2 -0.25 Chamfer .016/0.406 Max. x 45° Clamp .922 Dia. Max. 23.4 .062±.005 1.58±0.13 OPTIONAL TERMINAL CONFIGURATION 105° MAX .110 2.794 40° .020 Thickness VIEW B .060 ± .003 Dia. 1.524 ± .076 SLIDER .625 R MAX 15.9 R MAX .062 ± .003 1.524 ± .076 Enlarged View B Use Special Feature Code “FT” to order. METRIC CONVERSIONS 1 in. 1 oz. 25.4 mm 28.4 gm 2-112 1 oz.-in. 1 lb.-in. 0,007 N-m 0,113 N-m Model 7480 Series SPECIAL FEATURES Center Tap Linearity Tape Rear Shaft Extension Flatted Shaft Slotted Shaft (Standard on single gang 7486 without RS) Shaft Lock (7481, 7486 only) High Torque 2–6 oz.-in. (7486 only) Additional Gangs Gold plated solder lug terminals (See optional terminal configuration) CT LT RS FS SS SL HT 2G FT ORDERING INFORMATION 7486 R 10K T2 L .30 XX Optional Special Feature Code Model Series Resistance Prefix Resistance Value Linearity Optional Non-Standard Tolerance MATCHING TURNS COUNTING DIALS 7481: RBJ, 2601, 2641 7486: 2606, 2607, 2626, 2627, 2646, 2647, 2126, 2606S, 2607S, 2646S, 2647S, RB CIRCUIT DIAGRAM NOTES 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. (S) (CCW) (CW) INCH mm Tolerances unless otherwise specified: Linear = ± .01 inches (.25mm) Angular = ± 2 degrees 2-113 Model 7480 Series 2