Kyosho UM322C 1/48 22T Motor Pinion Steel  [KY-UM322C]

Compact steel pinion for 1/48 drive trains

This Kyosho UM322C steel pinion gear is a straightforward replacement for 1/48 scale RC models that use a 22-tooth motor pinion. Supplied as a single spare item, it helps restore drivetrain accuracy or enables minor adjustments to gear mesh and ratios.

The part aims to preserve the expected tooth shape and spacing of a 22T pinion in small motors, so it is appropriate for matching existing gear sets or testing mesh and ratio variations on 1/48 platforms. Always check the tooth count and mesh clearance against your current spur gear prior to fitting.

Fitting checklist: inspect the motor shaft to determine set screw or press-fit retention, verify axial placement and backlash, and use shims or motor mount adjustment where necessary to obtain proper mesh. Measure shaft diameter and set screw style before fitting rather than assuming compatibility.

Select this pinion to replace a worn 22T steel unit or to alter final drive ratios on a 1/48 scale RC rig; always verify fitment and gear mesh before operation.