48-Pitch 22T 45 Steel Motor Pinion MG522T/0.5M (5mm Shaft) by GPM  [MG522T/0.5M]

Pinion overview and specifications

This RC motor pinion is listed as MG522T/0.5M. It is a 22-tooth, 48-pitch pinion made from 45 steel with a module of 0.5mm and a motor tooth diameter of 5mm, intended for electric hobby models requiring a 48-pitch interface and a 5mm shaft fit.

The pinion transfers torque from the motor into the drivetrain and establishes the first stage of gearing. Choosing a 22T pinion alters acceleration and top-speed tradeoffs versus other tooth counts. The 45 steel construction gives a durable, wear-resistant profile suitable for frequent gear engagement in hobby use.

Installation notes—follow general, model-neutral practices: confirm the pinion tooth count and 48 pitch match the spur gear, ensure a snug fit on the 5mm motor shaft, and secure the gear using the motor’s original fastening or a compatible clamp. Inspect mesh and backlash before final tightening and re-check after a short break-in run. Use gear-safe lubricant sparingly to reduce noise and wear if desired.

Compatibility and tuning role—fit is determined by pitch, module, tooth count, and shaft interface rather than chassis catalog numbers; use these numeric characteristics to verify motor and spur compatibility and treat the pinion as a tuning component when adjusting overall gear ratios.