Model 208

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Vishay Spectrol

Revision: 22-Nov-16

2

Document Number: 57053

For technical questions, contact: sferprecisionpot@vishay.com

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DIMENSIONS in inches (millimeters)

MECHANICAL SPECIFICATIONS

PARAMETER

Rotation

360° continuous

Bearing type

SERVO MOUNT

Ball bearing

BUSHING MOUNT

Sleeve bearing

Ganging

6 sections maximum terminal alignment, added

sections within ± 10° of section 1 terminals

Torque (maximums)



Servo section 1



Bushing section 1



Each additional section

STARTING

0.7 oz. - in (50.40 g - cm)

1.0 oz. - in (72.0 g - cm)

0.4 oz. - in (28.80 g - cm)

RUNNING

0.4 oz. - in (28.80 g - cm)

0.7 oz. - in (50.40 g - cm)

0.3 oz. - in (21.60 g - cm)

Mechanical runouts (maximums):



Shaft (TIR/in)



Pilot dia. (TIR)



Lateral (TIR)



Shaft end play



Shaft radial play

SERVO

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)

Moment of inertia

1.0 g - cm2 per section maximum

Weight:



Single section



Each additional section

3.0 oz. (85.05 g)

1.0 oz. (28.35 g)

SERVO MOUNT: 208S/208-2

0.831

(21.10)

± 0.010

0.625

(15.88)

± 0.031

0.073 MIN.

(1.85)

Ø 1.5620

(39.67)

+ 0.0000

- 0.0005

Ø 1.750

(44.45)

Ø 0.2497

(6.34)

+ 0.0000

- 0.0003

0.062

(1.57)

MTG. FACE

Ø 1.750

(44.45)

± 0.015

Ø 1.562

MAX.

(39.67)

0.093

(2.36)

0.340 MIN.

(8.64)

45°

16° 20°

TYP.

1

2

3

1.015 R MAX.

(25.78)

BUSHING MOUNT: 208B/208-1

0.875

(22.22)

± 0.031

0.375

(9.52)

± 0.015

3/

8 - 32 UNEF - 2A

Ø 0.2497

(6.34)

+ 0.0000

- 0.0003

Ø 1.750

(44.45)

± 0.015

Ø 1.000

(25.40)

Ø 0.4062

(10.32)

+ 0.0000

- 0.0010

MTG. FACE

0.010

(0.25)

0.062

(1.57)

0.239 MIN.

(6.07)

0.705

(17.91)

± 0.010

1.075 R MAX.

(27.30)

± 5°

1

ADD 0.500 ± 0.002 (12.70) FOR EACH

ADDITIONAL SECTION

TOLERANCES: UNLESS OTHERWISE NOTED.

DECIMALS ± 0.005 ANGLES ± 2°

CW

SCHEMATIC

2

3

1

1

1