Extra Hard Steel Pinion Gear 5mm Bore Mod0.8 25T (RRP8725)

An extra-hard, high-carbon steel pinion gear for brushless RC motors, built for lasting durability with high-performance GEN3 steel. This 25-tooth pinion features a 5 mm bore and a 0.8 module, and is precision machined and stamped with the tooth count for quick identification. A 4 mm set screw is included to secure the pinion to the motor shaft, and it is suitable for 5 mm shaft motors; for 1/8" shaft motors, a reducer sleeve is required.

Note on compatibility: 32 pitch and 0.8 module gears can be used together without adverse effects such as increased noise or wear. The 0.8 module gears have a slightly larger outside diameter per tooth—about 0.00027 inch—so minor fit differences may occur when mixing gear types.