Model 852

Upper Grade Precision Potentiometer

Vishay Spectrol

Document Number: 57074

For technical questions, contact: sfer@vishay.com

www.vishay.com

Revision: 22-Mar-07

139

DIMENSIONS in inches (millimeters)

MECHANICAL SPECIFICATIONS

PARAMETER

Rotation

1080° + 10° - 0°

Bearing Type

SERVO

Ball bearing

SCREW

Ball bearing

BUSHING

Sleeve bearing

Torque (Maximums)

Servo or Screw Section 1

Bushing Section 1

Each Additional Section

STARTING

1.20 oz. - in (86.4 g - cm)

1.75 oz. - in (126.0 g - cm)

0.80 oz. - in (57.6 g - cm)

RUNNING

0.80 oz. - in (57.6 g - cm)

1.25 oz. - in (90.0 g - cm)

0.60 oz. - cm (43.2 g - cm)

Mechanical Runouts (Maximums):

Shaft Runout (TIR/in)

Pilot Dia. Runout (TIR)

Lateral Runout (TIR)

Shaft End Play

Shaft Radial Play

SERVO/SCREW

0.002" (0.05 cm)

0.002" (0.05 cm)

0.003" (0.08 cm)

0.005" (0.13 cm)

0.002" (0.05 cm)

BUSHING

0.002" (0.05 cm)

0.002" (0.05 cm)

0.005" (0.13 cm)

0.005" (0.13 cm)

0.003" (0.08 cm)

Weight (Maximums)

Single Section

Each Additional Section

Stop Strength

3.5 oz. (99.2 g)

2.7 oz. (76.5 g)

1000 oz. - in, static (72 kg - cm)

Ganging

3 sections maximum, terminal alignment, added sections

within ± 10° of section 1 terminals

Moment of Inertia

1.284

(32.61)

± 0.010

0.625

(15.88)

± 0.031

Ø 0.2497 TYP.

(6.34)

+ 0.0000

- 0.0003

Ø 2.000

(50.80)

Ø 1.875

(47.62)

+ 0.000

- 0.001

0.062

(1.57)

0.073 MIN.

(1.85)

0.093

(2.36)

MTG. FACE

0.062

(1.57)

Ø 1.812

(46.02)

± 0.015

MTG. FACE

± 0.015

0.219 TYP.

(5.56)

± 0.015

0.812

(20.62)

± 0.031

0.312

(7.92)

0.062

(1.57)

± 0.015

Ø 0.4062

(10.32)

+ 0.0000

- 0.0010

0.562

(14.27)

Ø 0.125

(3.18)

45°

± 10°

8 - 32 UNC - 2B 0.156

DEEP (3.96) 3

HOLES EQUALLY

SPACED ON A 1.250

Ø (31.75) B.C.

± 0.015

0.062

(1.57)

MTG. FACE

Ø 0.7500

(19.05)

+ 0.0000

- 0.0005

BUSHING MOUNT

SERVO MOUNT

SCREW MOUNT

0.301 MIN.

(7.64)

1

23

1.062 R MAX.

(26.97)

1

TOLERANCES: UNLESS OTHERWISE NOTED.

DECIMALS ± 0.005 ANGLES ± 2°

CW

SCHEMATIC

2

3

1

ADD 0.992 ± 0.010 (25.20) FOR EACH

ADDITIONAL SECTION