Model 157 www.vishay.com Vishay Spectrol 7 / (22.2 mm) Precision Industrial Potentiometer, 8 Bushing And Servo Mount Versions, Conductive Plastic 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) Material categorization: for definitions of compliance QUICK REFERENCE DATA please see www.vishay.com/doc 99912 Sensor type ROTATIONAL, conductive plastic Output type Output by turrets Market appliance Industrial 7 Dimensions / (22.2 mm) 8 ELECTRICAL SPECIFICATIONS PARAMETER MIL-PRF-39023 TEST PROCEDURES APPLY Resistance 1 k to 100 k Resistance Tolerance 20 % Special to 10 % Linearity 2.0 % Special to 0.25 % Temperature Coefficient of Resistance 600 ppm/C Power Rating 1.0 W at 40 C ambient Derated to 0 W at 125 C Electrical Angle 340 4 End Voltage 0.5 % maximum Dielectric Withstanding 1000 V , 60 Hz RMS Insulation Resistance 100 M minimum, 500 V DC Output Smoothness 0.1 % MECHANICAL SPECIFICATIONS PARAMETER Weight 0.5 oz. maximum (14 g) Rotation 360 (continuous) Mount BUSHING SERVO Bearing Type Sleeve bearing Ball bearing Operating Torque Starting 0.30 oz. - in (21.6 g - cm) 0.25 oz. - in (18 g - cm) Running 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) Revision: 30-Sep-14 Document Number: 57042 1 For technical questions, contact: sferprecisionpot vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000Model 157 www.vishay.com Vishay Spectrol ORDERING INFORMATION 157 B 503 M C TOLERANCE ON MODEL STYLE OHMIC VALUE LINEARITY SPECIAL REQUEST OHMIC VALUE 157 B: Bushing 470 = 47 M = 20 % X = 2 % xxxx 222 = 2.200 S: servo J = 5 % B = 0.50 % 103 = 10 k F = 1 % C = 0.25 % For ohmic value range see electrical specification PART NUMBER DESCRIPTION (for information only) 157- 2 1 503 xxxx MODEL STYLE GANGS OHMIC VALUE SPECIAL B: 1 S: 2 DIMENSIONS in inches (millimeters) BUSHING MOUNT: 157B/157-1 0.031 0.010 0.875 0.365 (22.22) (9.27) + 0.0000 90 0.9.52 x 1.57 WIDE 0.2497 - 0.0003 IMPERFECT (6.34) THREAD AREA 0.312 TERM 1 TERM 3 (7.92) 0.875 (22.2) TERM 2 0.010 LOCATING PIN 0.125 0.062 x 0.062 (3.18) 0.176 TERMINAL (1.57 x 1.57) 0.015 RADIUS (4.47) 0.345 RETAINER: 0.312 x 0.03 MAX. (8.76) 3 / - 32 UNEF - 2A 8 0.015 0.455 (11.56) Example of a marking for a standard part: RETAINER 157-11103 0.062 (1.57) 0.20 MAX. x 0.02 MAX. (5.08) 0.062 (1.57) 0.1248 2 0.050 0.1245 CW (1.27) (3.17) 1 3 SCHEMATIC SERVO MOUNT: 0.070 (1.78) 157S/157-2 0.750 0.7500 (19.05) (19.05) TOLERANCES: UNLESS OTHERWISE NOTED. 0.7495 0.062 (1.57) DECIMALS 0.005 ANGLES 2 0.031 0.500 (12.7) Revision: 30-Sep-14 Document Number: 57042 2 For technical questions, contact: sferprecisionpot vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc 91000