T PL IA N M CO *R oH S Features ■ Bushing mount ■ Shaft supported by front sleeve bearing ■ Non-standard features and specifications available 6657 - Precision Potentiometer Electrical Characteristics1 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 % 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 ................................................................................................................................ 1.5 watts +125 °C....................................................................................................................................0 watt Insulation Resistance (500 VDC) ................................................................ 1,000 megohms minimum Resolution ................................................................................................................Essentially infinite Product Dimensions 1.57 (.062) 10.317+.000/-.051 (.4062+.000/-.002) DIA. SHAFT 16.46 ± .38 (.648 ± .015) 3/8 "-32 UNEF-2ATHD 6.345 +.000/-.008 (.2498 +.0000/-.0003) DIA. SHAFT 33.34 (1-5/16) DIA. 45 ° ± 5 ° .38 X (.015) CHAMFER Environmental Characteristics1 9.53 ± .79 (3/8± 1/32) 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, 1.5 watts 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 3.18 (1/8) 22.23 ± .79 (7/8 ± 1/32) SHAFT SLOT 1.19 WIDE (.047) 1.60 DEEP X (.063) UR BO NS 2 3 1At room ambient: +25 °C nominal and 50 % relative humidity nominal, except as noted. 1 30 ° ± 3 ° TYP. Mechanical Characteristics1 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 ° maximum Weight ........................................................................................................................................ 32 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 cup maximum Hardware .................................................... One lockwasher (H-37-2) and one mounting nut (H-38-2) is shipped with each potentiometer. 6.35 R (.25) CW TOLERANCES: EXCEPT WHERE NOTED .51 .13 DECIMALS: .XX ± .XXX ± (.02), (.005) FRACTIONS: ±1/64 MM DIMENSIONS: (IN.) 2 CCW WIPER 3 1 CW CLOCKWISE Recommended Part Numbers Part Number* Resistance (Ω) 6657S-1-102 6657S-1-202 6657S-1-502 6657S-1-103 1,000 2,000 5,000 10,000 BOLDFACE LISTINGS ARE IN STOCK AND READILY AVAILABLE THROUGH DISTRIBUTION. FOR OTHER OPTIONS CONSULT FACTORY. *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications. 6657 - 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. 07/15 Specifications are subject to change without notice. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. Users should verify actual device performance in their specific applications.