7 / 8 " (22.2 mm) precision industrial potentiometer bushing and servo mount versions, conductive plastic model 157 vishay spectrol www.vishay.com for technical questions, contact: sfer@vishay.com document number: 57042 16 revision: 18-jun-07 features ? high quality ? rugged one piece metal housing ? long rotational life ? wide operating temperature range ? linearities down to 0.25 % special ? optional sealed construction (bushing mount only) rohs compliant electrical specifications parameter mil-prf-39023 test procedures apply resistance 1 k to 100 k resistance tolerance special to 20 % 10 % linearity special to 2.0 % 0.25 % temperature coefficient of resistance 600 ppm/c power rating derated to 1.0 w at 40 c ambient 0 w at 125 c electrical angle 340 4 end voltage 0.5 % maximum dielectric withstanding 1000 v rms , 60 hz insulation resistance 100 m minimum, 500 v dc output smoothness 0.1 % mechanical sp ecifications parameter weight 0.5 oz. maximum (14 g) rotation 360 (continuous) mount bearing type bushing sleeve bearing servo ball bearing operating torque starting running 0.30 oz. - in (21.6 g - cm) 0.25 oz. - in (18 g - cm) 0.25 oz. - in (18 g - cm) 0.15 oz. - in (10.8 g - cm) mechanical tolerance (in/mm) (maximum) shaft runout (tir) 0.002" (0.05 mm) 0.002" (0.05 mm) pilot dia runout (tir) - 0.002" (0.05 mm) lateral runout (tir) 0.005" (0.13 mm) 0.002" (0.05 mm) shaft end play 0.006" (0.15 mm) 0.005" (0.13 mm) shaft radial play 0.003" (0.08 mm) 0.002" (0.05 mm) ordering information/description 157 b 50k 20 % c bo10 model mounting ohmic value tolerance linearity packaging on ohmic value b = bushing c: 0.25 % box of 10 pieces s = servo
model 157 7 / 8 " (22.2 mm) precision i ndustrial potentiometer bushing and servo mount vers ions, conductive plastic vishay spectrol document number: 57042 for technica l questions, contact: sfer@vishay.com www.vishay.com revision: 18-jun-07 17 sap part numbering guidelines 157 s 502 m x b10 model style ohmic value tolerance linearity packaging on ohmic value 502 = 5k m: 20 % x: 2 % box of 10 pieces dimensions in inches (millimeters) material specifications housing/bushing aluminum, anodized rear lid ceramic shaft stainless steel terminals solderable bushing mount hardware lockwasher, internal tooth steel, nickel plated panel nut brass, nickel plated bushing mount: 157b... 0.455 (11.56) 0.015 0.062 (1.57) 0.062 (1.57) ? 0.124 8 ? 0.1245 (3.17) 0.062 (1.57) 0.500 (12.7) ? 0.750 (19.05) ? 0.070 (1.7 8 ) ? 0.050 (1.27) retainer ? 0.20 max. x 0.02 max. (5.0 8 ) ? 0.7500 (19.05) ? 0.7495 123 157 - xxxx xxx xx % xx % xxxx xxx country servo mount: 157s... 0. 8 75 (22.22) 0.031 ? 0.2497 (6.34) retainer: ? 0.312 x 0.03 max. 3 / 8 - 32 unef - 2a 0.345 ( 8 .76) 0.015 0.125 (3.1 8 ) 0.010 ? 0.9.52 x 1.57 wide imperfect thread area 0.365 (9.27) 0.010 0.312 (7.92) locating pin ? 0.062 x 0.062 (1.57 x 1.57) term 1 term 2 term 3 90 ? 0. 8 75 (22.2) 0.176 terminal radius (4.47) marking + 0.0000 - 0.0003 tolerances: unless otherwise noted. decimals 0.005 angles 2 cw schematic 2 3 1 0.031 environmental specifications temperature - 55 c + 125 c rotational life bushing 5 million shaft revolutions servo 10 million shaft revolutions moisture resistant yes vibration 15 g 10 to 2000 hz shock 50 g salt spray 96 h load life 900 h
document number: 91000 www.vishay.com revision: 18-jul-08 1 disclaimer legal disclaimer notice vishay all product specifications and data are subject to change without notice. vishay intertechnology, inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively, ?vishay?), disclaim any and all liability fo r any errors, inaccuracies or incompleteness contained herein or in any other disclosure relating to any product. vishay disclaims any and all li ability arising out of the use or application of any product describ ed herein or of any information provided herein to the maximum extent permit ted by law. the product specifications do not expand or otherwise modify vishay?s terms and conditions of purcha se, including but not limited to the warranty expressed therein, which apply to these products. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of vishay. the products shown herein are not designed for use in medi cal, life-saving, or life-sustaining applications unless otherwise expressly indicated. customers using or selling vishay products not expressly indicated for use in such applications do so entirely at their own risk and agree to fully indemnify vishay for any damages arising or resulting from such use or sale. please contact authorized vishay personnel to obtain written terms and conditions regarding products designed for such applications. product names and markings noted herein may be trademarks of their respective owners.
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