PL IA NT CO M *R oH S Features ■ Bushing mount ■ Excellent resolution ■ High rotational life ■ Non-standard features and specifications available 6637 - Precision Potentiometer Electrical Characteristics1 Product Dimensions Standard Resistance Range....................................................................................1 K to 100 K ohms Total Resistance Tolerance......................................................................................................... ±10 % Independent Linearity ................................................................................................................... ±1 % Effective Electrical Angle .......................................................................................................340 ° ±3 ° End Voltage .................................................................................................................0.5 % maximum Output Smoothness .....................................................................................................0.1 % maximum Dielectric Withstanding Voltage (MIL-STD-202, Method 301) Sea Level .............................................................................................................750 VAC minimum Power Rating (Voltage Limited By Power Dissipation or 300 VAC, Whichever is Less) +70 °C......................................................................................................................................1 watt +125 °C....................................................................................................................................0 watt Insulation Resistance (500 VDC) ................................................................ 1,000 megohms minimum Resolution.................................................................................................................Essentially infinite 6637 7/8 " (22 mm) DIA. 2 3 1.57 11.25 .38 (.062) (.443 .015) 22.23 (7/8) DIA. 1 30 3 TYP. 10.317 + .000/- .051 DIA. (.4062+.000/-.002) 3/8-32 UNEF-THD 3.170 + .000/-.008 DIA. (.1248+.0000/-.0003) 45 5 .25 (.010) CHAMFER X 3.18 (1/8) 9.53 .79 (3/8 1/32) 22.23 .79 (7/8 1/32) SHAFT SLOT .81 .81 (.032) WIDE X (.032) DEEP NOTE: SHAFT SUPPORTED BY FRONT SLEEVE BEARING. 2 CCW Mechanical Characteristics1 4.83 R (.19) CW Environmental Characteristics1 Operating Temperature Range ................................................................................. -40 °C to +125 °C Storage Temperature Range .................................................................................... -65 °C to +125 °C Temperature Coefficient Over Storage Temperature Range ...........................±500 ppm/°C maximum Vibration ........................................................................................................................................15 G Wiper Bounce ........................................................................................... 0.1 millisecond maximum Total Resistance Shift ...............................................................................................±5 % maximum Voltage Ratio Shift .................................................................................................±0.5 % maximum Shock.............................................................................................................................................50 G Wiper Bounce ........................................................................................... 0.1 millisecond maximum Total Resistance Shift ...............................................................................................±5 % maximum Voltage Ratio Shift .................................................................................................±0.5 % maximum Load Life .................................................................................................................1,000 hours, 1 watt Total Resistance Shift .............................................................................................±10 % maximum Rotational Life (No Load)......................................................................... 10,000,000 shaft revolutions Total Resistance Shift .............................................................................................±10 % maximum Moisture Resistance (MIL-STD-202, Method 106) Total Resistance Shift .............................................................................................±15 % maximum IP Rating ....................................................................................................................................... IP 40 UR BO NS WIPER 3 1 CW CLOCKWISE Stop Strength.................................................................................................53 N-cm (75 oz.-in.) min. Mechanical Angle ............................................................................................................... Continuous Torque (Starting & Running) ............................................................. 0.40 N-cm (0.5 oz.-in.) maximum Mounting ..............................................................................170-200 N-cm (15-18 lb.-in.) maximum Shaft Runout...............................................................................................0.025 mm (0.001 in.) T.I.R. Shaft End Play ..............................................................................................0.13 mm (0.005 in.) T.I.R. Shaft Radial Play ..........................................................................................0.13 mm (0.005 in.) T.I.R. Backlash ....................................................................................................................... 0.1 º maximum Weight ........................................................................................................................................ 16 gm Terminals ..................................................................................................................... Rear turret type Soldering Condition Manual Soldering .................................96.5Sn/3.0Ag/0.5Cu solid wire or no-clean rosin cored wire 370 °C (700 °F) max. for 3 seconds Wave Soldering ........................................................ 96.5Sn/3.0Ag/0.5Cu solder with no-clean flux 260 °C (500 °F) max. for 5 seconds Wash processes ..................................................................................................Not recommended Marking .................................Manufacturer’s name and part number, resistance value and tolerance, linearity tolerance, wiring diagram, and date code. Ganging (Multiple Section Potentiometers) ...................................................................1 up maximum Hardware ...................................One lockwasher (H-37-2) and one mounting nut (H-38-2) is shipped with each potentiometer. Recommended Part Numbers Part Number Resistance (Ω) 6637S-1-102 6637S-1-502 6637S-1-103 1,000 5,000 10,000 BOLDFACE LISTINGS ARE IN STOCK AND READILY AVAILABLE THROUGH DISTRIBUTION. FOR SERVO MOUNT VERSION AND OTHER OPTIONS CONSULT FACTORY. 1At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted. *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 6637 - Precision Potentiometer Panel Thickness Dimensions 2.46 - 3.81 (.097 - .150) PANEL HEX NUT 10.44 ± .07 DIA. (.411 ± .003) LOCKWASHER POT Panel thickness and hole diameters are recommended for best fit. However, customers may adjust the dimensions to suit their specific application. DIMENSIONS: MM (INCHES) TOLERANCES: ± 0.127 (.005) REV. 10/11 Specifications are subject to change without notice. Customers should verify actual device performance in their specific applications