Model 157
www.vishay.com
Vishay Spectrol
7/
8"
(22.2 mm) Precision Industrial Potentiometer,
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)
QUICK REFERENCE DATA • Material categorization: for definitions of compliance
Sensor type ROTATIONAL, conductive plastic please see www.vishay.com/doc?99912
Output type Output by turrets
Market appliance Industrial
Dimensions 7/ " (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 VRMS, 60 Hz
Insulation Resistance 100 M minimum, 500 VDC
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 1 Document Number: 57042
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
Model 157
www.vishay.com
Vishay Spectrol
ORDERING INFORMATION
1 5 7 B 5 0 3 M C
TOLERANCE ON
MODEL STYLE OHMIC VALUE OHMIC VALUE LINEARITY SPECIAL REQUEST
157 B: Bushing 470 = 47 M = ± 20 % X=±2% xxxx
S: servo 222 = 2.200 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
± 0.010 ± 0.031
0.875
0.365 (22.22)
(9.27)
+ 0.0000
90° Ø 0.9.52 x 1.57 WIDE Ø 0.2497 - 0.0003
IMPERFECT (6.34)
THREAD AREA
0.312
TERM 1 TERM 3 (7.92)
Ø 0.875
(22.2)
TERM 2 ± 0.010 LOCATING PIN Ø
0.125
(3.18) 0.062 x 0.062
0.176 TERMINAL (1.57 x 1.57)
RADIUS (4.47) ± 0.015
0.345
(8.76) RETAINER: Ø 0.312 x 0.03 MAX.
3/ - 32 UNEF - 2A
8
0.455 ± 0.015
Example of a marking for a standard part: (11.56)
157-11103 0.062 (1.57) RETAINER
Ø 0.20 MAX. x 0.02 MAX. (5.08)
0.062 (1.57)
Ø 0.1248
2 Ø 0.050
CW (1.27) Ø 0.1245
(3.17)
1 3
SCHEMATIC SERVO MOUNT:
Ø 0.070
(1.78) 157S/157-2
Ø 0.750
(19.05) Ø 0.7500 (19.05)
TOLERANCES: UNLESS OTHERWISE NOTED.
0.062 (1.57) Ø 0.7495
DECIMALS ± 0.005 ANGLES ± 2°
0.500 ± 0.031
(12.7)
Revision: 06-Nov-15 2 Document Number: 57042
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
Model 157
www.vishay.com
Vishay Spectrol
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
ENVIRONMENTAL SPECIFICATIONS
Temperature -55 °C to +125 °C
BUSHING SERVO
Rotational Life
5 million shaft revolutions 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
Note
• Nothing stated herein shall be construed as a guarantee of quality or durability.
Revision: 06-Nov-15 3 Document Number: 57042
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
Legal Disclaimer Notice
www.vishay.com
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
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“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
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the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
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Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of
typical requirements that are often placed on Vishay products in generic applications. Such statements are not binding
statements about the suitability of products for a particular application. It is the customer’s responsibility to validate that a
particular product with the properties described in the product specification is suitable for use in a particular application.
Parameters provided in datasheets and / or specifications may vary in different applications and performance may vary over
time. All operating parameters, including typical parameters, must be validated for each customer application by the customer’s
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including but not limited to the warranty expressed therein.
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Revision: 01-Jan-2019 1 Document Number: 91000
