Hardened Steel Pinion Gear 5mm Bore 48P 21T (RRP2021)

This hardened steel pinion gear features a 5mm bore, 21 teeth, and 48 pitch, machined for precision. It’s designed to transfer motor power reliably in compact drive systems such as model cars and small RC gearboxes.

Mounting on a 5mm shaft, the 21-tooth, 48-pitch profile delivers smooth, consistent engagement with a matching spur gear. Hardened steel resists wear, while the machined teeth ensure precise meshing for dependable performance in everyday hobby applications.