Model 25 www.vishay.com Vishay Spectrol Model 25 (PR1) 46 mm Diameter, 20 Turn Dial FEATURES Large package size For use with precision potentiometers or other RoHS COMPLIANT devices, up to 20 turns Excellent readability Precision feel - no backlash Cast housing QUICK REFERENCE DATA Material categorization: For definitions of compliance Sensor type DIALS please see www.vishay.com/doc 99912 Market appliance Industrial Dimensions 46 mm diameter 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. 18.1 mm (0.710 ) min. Shaft Extension Beyond Panel 22.5 mm (0.925 ) max. DIMENSIONS in millimeters (inches) 10.36 mm (0.41 ) 14.30 mm (0.562 ) 3.17 mm (0.125 ) Using the existing Antirotation Lug EASY REMOVABLE WITH PLIERS 1. Drill 3.2 mm (0.125) diameter antirotation pin hole on vertical centerline 14.3 mm (0.562) below center of potentiometer Using the Antirotation Device mounting hole. 1. Remove antirotation lug from dial by using pliers. 2. Mount potentiometer shaft counterclockwise to obtain minimum 2. Mount potentiometer in panel with antirotation device nut resistance or voltage ratio. This is not necessarily identical with the (supplied with dial) and lockwasher (supplied with potentiometer). PANEL HOLE PATTERN mechanical stop. 3. Turn potentiometer shaft counterclockwise to obtain minimum 4. Loosen set screws in knob of dial. Set dial. Set dial to 0.0 reading. resistance or voltage ratio. This is not necessaryly identical with 5. While holding outer ring of dial, position unit lightly against panel. the mechanical stop. Tighten knob set screws to potentiometer shaft. 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. ORDERING INFORMATION/DESCRIPTION 25 A 11 B010 e SHAFT DIAMETER MODEL FINISH PACKAGING LEAD FINISH ACCOMMODATION AND FIXINGS A 1/4 dia. shaft - 1set screw 11 Satin chrome, black markings (standard) B 6 mm metric bore - 1 set screw 21 Black chrome, white markings C 1/8 dia. shaft -1 set screw 41 Satin chrome, white markings Example: 25 - A - 11 D 3 mm metric bore - 1 set screw SAP PART NUMBERING GUIDELINES 25 A 11 B10 MODEL SHAFT DIAMETER FINISH PACKAGING Revision: 06-Aug-12 Document Number: 57079 1 For technical questions, contact: sferprecisionpot vishay.com THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. 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No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners. Revision: 13-Jun-16 Document Number: 91000 1