2 2-97 model 7280 series model 7280 series 7/8?diameter 10-turn wirewound precision potentiometer electrical resistance range, ohms 100 to 100k standard resistance tolerance ?% minimum practical resistance tolerance ?% independent linearity ?.25% minimum practical independent linearity ?.15%, < 300 ohms ?.075%, 300 ohms power rating, watts 2.0 at 70? derating to 0 at 125? dielectric strength 1,000v rms insulation resistance, minimum 1,000 megohms noise, maximum 100 ohms actual electrical travel 3600 + 10 ?0? > 100 ohms 3600 + 10 ?5? 100 ohms tap tolerance ? end voltage, maximum 0.25% of input voltage model styles 7281 1/8?shaft, 1/4?bushing 7283 1/8?shaft, servo 7284 6mm shaft, 3/8?bushing 7286 1/4?shaft, 3/8?bushing 7288 (for heavy side load applications) new product 1/4?shaft, 3/8?bushing specifications subject to change without notice.
2-98 model 7280 series mechanical total mechanical travel 3600 + 15 ?0 number of gangs, maximum 2 weight, nominal (single gang) 0.75 oz. backlash, maximum 1 7281, 7284, 7286 7283 static stop strength 60 oz.-in. 36 oz.-in. panel nut tightening torque, maximum 25 lb.-in. n/a shaft end play, maximum .010 .005 shaft runout, t.i.r., maximum .003 .002 pilot diameter runout, t.i.r., maximum .004 .002 lateral runout, t.i.r., maximum .005 .004 shaft radial play, maximum .003 .002 start/run torque, maximum (per gang) 0.8 oz.-in. 0.6 oz.-in. standard resistance values, ohms theoretical total resolution tempco resistance (% nominal) of wire 100 0.059 ?0 ppm/? 200 0.037 ?0 ppm/? 500 0.030 ?0 ppm/? 1k 0.024 ?0 ppm/? 2k 0.020 ?0 ppm/? 5k 0.018 ?0 ppm/? 10k 0.017 ?0 ppm/? 20k 0.016 ?0 ppm/? 50k 0.010 ?0 ppm/? 100k 0.008 ?0 ppm/? environmental (mil-r-12934) operating temperature range static: ?5? to +125? dynamic: ?0? to +125? temperature cycling 5 cycles, ?5? to +125? (5% ? r) shock, 6ms sawtooth 100g? (0.1ms discontinuity max.) vibration 15g?, 10 to 2,000 hz (5% ? r, 0.1ms discontinuity max.) moisture resistance five 24 hour cycles (3% ? r) high temperature exposure 1,000 hours at 125? (5% ? r) rotational load life 1 mil. shaft rev. + 900 hrs. at rated wattage at 70? (5% ? r) rotational life model 7288 (1 pound side load) 1 mil. shaft rev. + 900 hrs. at rated wattage at 70? (5% ? r)
2 2-99 model 7280 series outline dimensions (inch/mm) .625 15.9 r max. .875 .016 22.2 0.41 dia. 75 max. slot: .032 .005/0.813 0.127 wide x .032+.010-.000/0.813+0.254-0.000 deep (not on rear shaft models) chamfer .016/0.41 max. x 45 dim. d .312 .016 7.93 0.41 +.000 -.010 +0.00 -0.25 .062 1.58 .080 .001 2.03 0.03 dia. 1.125 .031 28.58 0.79 mounting surface dim. a dim. b dim. c .125 3.18 min. .750 .016 19.1 0.41 slider ccw cw dim. 7286 7284 7281 a b c d .688 .031 17.475 0.787 .812 .031 20.625 0.787 .812 .031 20.625 0.787 +0.0000 -0.0003 +0.0000 -0.0076 dia. .1248 3.1699 +0.0000 -0.0005 +0.0000 -0.0127 dia. .2362 6.0000 +0.0000 -0.0005 +0.0000 -0.0127 dia. .2500 6.3500 +0.000 -0.002 +0.000 -0.051 dia. .281 7.137 +0.000 -0.002 +0.000 -0.051 dia. .406 10.312 +0.000 -0.002 +0.000 -0.051 dia. .406 10.312 1/4 - 32 unef thread 3/8 - 32 unef thread 3/8 - 32 unef thread optional terminal configuration 40 slider .625 r max 15.9 r max view b .110 2.794 .020 thickness .060 .003 1.524 .076 .062 .003 1.524 .076 enlarged view b dia. use special feature code ?t?to order. models 7281, 7284 and 7286 bushing mount with sleeve bearing
2-100 model 7280 series optional terminal configuration 105 max. clamp .922 23.4 dia. max. .625 15.9 r. max. clamp ears .875 .016 22.2 0.41 housing dia. slider .080 .001 2.03 0.03 dia. .057 1.45 min. .062 .005 1.58 0.13 .062 .005 1.58 0.13 chamfer .016/0.406 max. x 45 .625 15.875 +.000 -.001 +0.000 -0.025 .875 22.2 +.005 -.010 +0.13 -0.25 .1248 3.1699 +.0000 -.0003 +0.0000 -0.0076 dia. dia. dia. mounting surface .375 .031 9.53 0.79 .781 19.8 dia. max. 1.250 .031 31.75 0.79 .875 .016 22.2 0.41 .250 6.35 min. ccw cw outline dimensions (inch/mm) 40 slider .625 r max 15.9 r max view b 105 max use special feature code ?t?to order. .110 2.794 .020 thickness .060 .003 1.524 .076 .062 .003 1.524 .076 enlarged view b dia. metric conversions 1 in. 25.4 mm 1 oz. 28.4 gm 1 oz.-in. 0,007 n-m 1 lb.-in. 0,113 n-m model 7283 servo mount with ball bearing
2 2-101 model 7280 series ordering information 7286 r 10k t2 l .25 xx model series resistance prefix resistance value optional special feature code linearity optional non-standard tolerance (ccw) (s) (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 notes mm inch circuit diagram matching turns counting dials 7281: rbj, 2601, 2641 7286: 2606, 2607, 2626, 2627, 2646, 2647, 2126, 2606s, 2607s, 2646s, 2647s, rb special features center tap ct linearity tape lt rear shaft extension (7283, 7286 single cup only) rs flatted shaft fs slotted shaft (standard on single cup 7286 without rs) ss shaft lock (7281, 7286 only) sl high torque, 2? oz.-in. (7286 only) ht additional gangs 2g gold plated solder lug terminals (see optional terminal configuration) ft
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