Model 157

www.vishay.com

Vishay Spectrol

Revision: 06-Nov-15

1

Document Number: 57042

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

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

Sensor type

ROTATIONAL, conductive plastic

Output type

Output by turrets

Market appliance

Industrial

Dimensions

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

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



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)