Yokomo YOKPG6442 pinion gear, 64 Pitch 42 Teeth pinion for R/C gear setups  [YOKPG6442]

64 Pitch 42T Pinion Gear

The Yokomo YOKPG6442 is a 64 pitch, 42-tooth pinion intended as a direct replacement part for R/C gear trains that use 64-pitch gearing. As a basic drivetrain component, its role is to transfer rotation from the motor to the spur gear and determine the overall gear ratio when combined with the spur.

Installation notes: confirm the pinion matches your 64-pitch spur and that the motor shaft type is compatible with the pinion bore and set-screw arrangement before fitting. Start with a conservative mesh, check for even contact across the tooth face, then fine-tune with minimal lateral movement. Secure the set-screw(s) while holding the motor steady to avoid misalignment, and recheck gear mesh after a short run to detect any seating changes.

Tuning guidance: changing tooth count on the pinion alters acceleration and top speed trade-offs, so use the 42-tooth option as one step in incremental ratio testing. After any ratio change, inspect for excessive heat, unusual noise, or worn teeth and adjust mesh and pinion height as needed. Regular maintenance includes cleaning debris from the gear teeth and checking for burrs or damage that can accelerate wear on both pinion and spur.