Dear Valued Customers, updates as of 1/07/2017:

  • Orders outside of 2 day ground area will get their orders shipped out via 2-3 day priority mail, this means our customers on the east coast will get items faster. Note, any long items such as hex stock etc.. will not be shipped at that speed. Our mission is to get parts to you as fast as possible. 
  • MCC Robot Release is available here: Full details will be available on 01/13/2017. Follow us on Facebook, Twitter and Instagram to get sneak peaks and live updates. 
  • For Customer Support, email is fastest and suggested, please email Calls will be returned when possible, we HIGHLY suggest to just email the support email. 
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Call +559-380-9909: 10am - 3pm PST

How To: Gears

Basic Properties: 4140  Steel (Annealed) 7075 - T6 Aluminum 6061 - T6 Aluminum
Density 0.283 lb/in³ 0.102 lb/in³ 0.0975 lb/in³
Tensile Strength (Ultimate) 95 KSI 76 KSI 45 KSI
Tensile Strength (Yield) 60.5 KSI 67 KSI 40 KSI
% Elongation 26% 11% 12%
Weight Comparison 1 LB .358 LB .341 LB

-Sources: McMaster and MatWeb 

-WCP uses 7075 - T6 to provide lighter gears than Steel (about 1/3 the weight) , but still decently stronger than regular 6061 Aluminum.

General Gear Information:

  • Gears are normally .500" wide (Unless otherwise specified).
  • Gears also have a protrusion, a tiny nub on both sides of the gear (Unless otherwise specified).
  • Gear will come anodized (Type III), used to harden the gear and prevent corrosion.
  • Gears will have a teflon coating on them. 
  • The nub is designed to butt up against the face of the bearing, this elimates the need for a spacer and reduces part count.
  • WCP highly suggests using the grease mentioned below:
    • DuPont (Dry-Grease) - McMaster (#8710T35)
  • The normal recommended rule of thumb for FRC robots is +.003 spacing between gears.
  • These gears have a modified tooth profile to compensate for anodizing.
  • WCP recommends:
    • For a single stage gearbox (custom): +.000 - +.001 backlash
    • For any other gearboxes: +.002 - +.003 is recommended.