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: 06-Nov-15 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 K = 10 % B = 0.50 %
103 = 10 k
C = 0.25 %
For ohmic value
range see electrical
specification
PART NUMBER DESCRIPTION (for information only)
157- 2 503 xxxx
MODEL STYLE 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: 06-Nov-15 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