PL IA NT Features S CO M ■ *R oH ■ ■ ■ ■ ■ Large package size - 46 mm diameter “Metalized” plastic dial body Strong locking brake Economical Ideal for use with 10-turn potentiometers RoHS compliant* Model H-46 is preferred. H-550 Turns-Counting Dial Mechanical and Physical Characteristics Number of Turns ..................................................................................................................................................................................0 to 11 Dial Divisions ...............................................................................................................................................................................100 per turn Readability – Over 10 Turns .........................................................................................................................................Within 1/100 of a turn Torque With Brake Engaged.....................................................................................................................8.47 N-cm (12.0 oz.-in.) maximum Markings...........................................................................................................................................................................Black on clear gray Locking Brake............................................................................................................................................................................................Yes Weight...............................................................................................................................................................................13 grams (0.46 oz.) Set Screw .................................................................................................................................................................UNC 4/40, one included Set Screw Tightening Torque ......................................................................................................................12.00 N-cm (17 oz-in.) minimum 17.65 N-cm (25 oz-in.) maximum Hex Key Size ................................................................................................................................................................................0.05 in. hex Shaft and Bushing Requirements Shaft Diameter Requirements .......................................................................................................................0.635 mm (0.0250 in.) diameter Shaft Extension Beyond Panel .........................................................................................................................17.5 mm (0.689 in.) minimum 22.5 mm (0.886 in.) maximum Bushing Extension Beyond Panel .....................................................................................................................7.0 mm (0.276 in.) maximum E T E L O S B O H-550 MOUNTING INSTRUCTIONS 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 to “0.0” reading. 5. While holding outer ring of dial, position unit lightly against panel. Tighten knob set screws to potentiometer shaft. Dimensional Drawing DIMENSIONS: MM (IN.) 24.6 (.96) 15.9 (.625) 10.31 DIA. (.405) 46.0 (1.811) 14.30 (.562) 3.17 (.124) DIA. PANEL LAYOUT How to Order Part Number REV. 10/08 *RoHS Directive 2002/95/EC Jan 27 2003 including Annex. Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications. Accepts Shaft Diameter Finish H-550-6A (10 per box) 6.35 mm (.250 in.) Grey Metalized Plastic H-550-6A-1 (1 per box) 6.35 mm (.250 in.) Grey Metalized Plastic