GPM MG522T/0.5M 45 Steel Motor Gear 22T (48 Pitch, Module: 0.5mm, Motor Tooth Diameter: 5mm)  [MG522T/0.5M]

Motor pinion gear overview

This is an RC-scale motor pinion designed and sold under the GPM MG522T/0.5M identifier, specified as a 22-tooth 48 pitch pinion made from 45 steel with module 0.5mm and a motor tooth diameter of 5mm. The part is intended for hobby electric models where a 48 pitch pinion is required and where a 5mm motor shaft interface is used.

The component’s primary role is to transfer torque from the motor to the drivetrain while defining the first step of the vehicle’s gear ratio. A 22T pinion like this one changes overall gearing compared with larger or smaller pinions, so it is typically chosen to adjust acceleration versus top speed in model setups. Because material and tooth profile affect wear and durability, 45 steel offers a balance of hardness suitable for frequent mesh engagement in hobby applications.

Installation notes—keep to general, model-agnostic practices: confirm the pinion’s tooth count and 48 pitch match the spur gear, verify the 5mm motor shaft fits without excessive play, and use the motor’s original fastening method or compatible clamp/pinion hardware to secure the gear. Check mesh and backlash with the driven spur before final tightening, and re-check after a short running session for settling. Use common gear-safe lubricants sparingly if desired to reduce wear and noise.

Compatibility and tuning role—this pinion is described by its pitch, module, tooth count, and shaft interface rather than by a list of chassis models; use those numeric characteristics to determine fit for your motor and spur gear combination, and treat the pinion as a tuning element when adjusting gear ratios in your model.