Model 25

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Vishay Spectrol

Revision: 06-Aug-12

Document Number: 57079

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 25 (PR1)

46 mm Diameter, 20 Turn Dial

FEATURES

• Large package size

• For use with precision potentiometers or other

devices, up to 20 turns

• Excellent readability

• Precision feel - no backlash

•Cast housing

• Material categorization: For definitions of compliance

please see www.vishay.com/doc?99912

DIMENSIONS in millimeters (inches)

QUICK REFERENCE DATA

Sensor type DIALS

Market appliance Industrial

Dimensions 46 mm diameter

RoHS

COMPLIANT

MECHANICAL SPECIFICATIONS

Accepts Shaft Diameter 6.35 mm (0.250")/6 mm/3.17 (0.125")/3 mm

Number of Turns 0 to 20

Dial Division 100 per turn

Torque with Brake Engaged 5 oz. - in (350 g - cm) min.

Markings Black on satin chrome

Weight 75 g

Set Srew UNC 4-40

Hex Key Size 1.27 mm (0.05")

Bushing Extension Beyond Panel 6.35 mm (0.250") max.

Shaft Extension Beyond Panel

18.1 mm (0.710") min.

22.5 mm (0.925") max.

ORDERING INFORMATION/DESCRIPTION

25 A 11 B010 e

MODEL

SHAFT DIAMETER

ACCOMMODATION AND FIXINGS

FINISH PACKAGING LEAD FINISH

Example: 25 - A - 11

A 1/4" dia. shaft - 1set screw

B 6 mm metric bore - 1 set screw

C 1/8" dia. shaft -1 set screw

D 3 mm metric bore - 1 set screw

11 Satin chrome, black markings (standard)

21 Black chrome, white markings

41 Satin chrome, white markings

SAP PART NUMBERING GUIDELINES

25 A 11 B10

MODEL SHAFT DIAMETER FINISH PACKAGING

Using the existing Antirotation Lug

1. Drill 3.2 mm (0.125) diameter antirotation pin hole on vertical

centerline 14.3 mm (0.562) below center of potentiometer

mounting hole.

2. Mount potentiometer shaft counterclockwise to obtain minimum

resistance or voltage ratio. This is not necessarily identical with the

mechanical stop.

4. Loosen set screws in knob of dial. Set dial. Set dial to “0.0” reading.

5. While holding outer ring of dial, position unit lightly against panel.

Tighten knob set screws to potentiometer shaft.

Ø 10.36 mm

(0.41")

Ø 3.17 mm

(0.125")

Ø 14.30 mm

(0.562")

PANEL HOLE PATTERN

Using the Antirotation Device

1. Remove antirotation lug from dial by using pliers.

2. Mount potentiometer in panel with antirotation device nut

(supplied with dial) and lockwasher (supplied with potentiometer).

3. Turn potentiometer shaft counterclockwise to obtain minimum

resistance or voltage ratio. This is not necessaryly identical with

the mechanical stop.

4. Loosen screws in knob of dial. Set dial to “0.0” reading.

5. While holding outer ring of dial, position unit lightly against panel.

Tighten knob set screws to potentiometer shaft.

EASY REMOVABLE WITH PLIERS

Legal Disclaimer Notice

www.vishay.com

Vishay

Revision: 08-Feb-17

Document Number: 91000

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

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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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