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Specifications
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Model 21 Vishay Spectrol Document Number: 57088For technical questions, contact: sfer@vishay.comwww.vishay.com Revision: 09-N

Specifications
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Content	Model 21 Vishay Spectrol Document Number: 57088For technical questions, contact: sfer@vishay.comwww.vishay.com Revision: 09-Nov-06175 46.02 mm Diameter 15 Turn Dial FEATURES •Round vernier scale •1 13/16 dia. •1/4 or 1/8 or 6 mm metric bore shaft adapter •Satin chrome finish with black markings •Black chrome finish with white markings •Brushed chrome finish with black markings RoHS COMPLIANT MECHANICAL SPECIFICATIONS PARAMETER Mounting Direct to shaft with # 4 - 40 hex socket set screw located adjacent to No.75 on graduated dial. Numeral Size: Counter Wheel: Graduated Dial:0.90 H x 0.013 W (2.29 x 0.33 cm) 0.109 x 0.018 (2.77 x 0.46 cm) Graduation Size: Numeral and Every Fifth Intermediate Width 0.55 L (1.40 cm) 0.035 L (0.89 cm) 0.012 (0.30 cm) Weight3.0 max. (85.05) OPERATIONAL SPECIFICATIONS Readout and Operation 1499 turns total The number in window (0 thru 14) indicates completed number of turns of the drive sleeve. Graduated circular dial indicates the percent of the partial turn of the drive sleeve Transfer Point The number in center of window shall change as graduated dial rotates between 94 and 0 Rotation Readout shall increase with clockwise and decrease with counterclockwise rotation AccuracyZero blacklash between graduated dial and the drive sleeve DIMENSIONS in inches (millimeters) ORDERING INFORMATION/DESCRIPTION 21A11B010e MODELSHAFT DIAMETER AND ACCOMODATIONFINISH AND OTHER FEATURES PACKAGINGLEAD FINISH A 1/4 Shaft (standard) B 6 mm metric bore shaft adapter C 1/8 Shaft adapter 11. Satin chrome, black markings 21. Black chrome, white markings 31. Brushed chrome, black markings Example: 21 - A - 11 SAP PART NUMBERING GUIDELINES 21A11B10 MODELSHAFT DIAMETERFINISHPACKAGING 0.562(14.27) 0.094(2.39) 0.125(3.18) ± 0.001 Ø 0.250(6.35) ± 0.005 - 0.000Ø 0.390(9.91) DRIVE SLEEVE MOUNTING FACE TURNING KNOB SET SCREW0.046(1.17) ± 0.000 - 0.015 0.128(3.25)0.268(6.81) 0.578(14.68) 0.922(23.42) ± 0.015 ± 0.015 - 0.000 ± 0.031 COUNTING DIALBRAKE LEVER GRADUATED DIAL BASE Ø 1.812 P(46.02) 1.094 R MAX.(27.79) ± 5°46° ± 5°22° SET SCREW LOCATION ATNO 75 ON DIAL FACE 1.000(25.40) ± 0.015 ± 0.001 - 0.000
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