22T 48 Pitch Motor Pinion MG522T/0.5M Module 0.5mm 5mm Shaft by GPM  [MG522T/0.5M]

Overview: fit and selection

The MG522T/0.5M is a 22-tooth pinion specified for 48-pitch systems, made from 45 steel with a 0.5mm module and a 5mm motor tooth diameter. It is intended for electric hobby models where a 48-pitch pinion and a 5mm shaft interface are required.

Its role is to transfer rotational force from the motor into the gearbox and set the first stage of the gear ratio. A 22T pinion will change the model's acceleration and speed balance compared with other sizes. The 45 steel construction provides a hard-wearing tooth profile appropriate for routine mesh engagement.

Installation advice—confirm that pitch and module match the spur, check that the 5mm shaft accepts the pinion without play, and use compatible fastening hardware. Adjust mesh carefully, tighten progressively, and revisit the setting after a short run to confirm stability.

Compatibility guidance—use the numeric specifications (pitch, module, tooth count, shaft diameter) to verify fit rather than relying on chassis model names. Consider the pinion as a tuning item when modifying overall drivetrain ratios.