21T 0.8Mod Safe-D5 Pinion Gear (ARA311004)

This tough steel 21T 0.8 Module Safe-D Pinion Gear is the perfect part to carry in your RC tool box.

It features strong and durable steel for long-lasting performance in extreme RC conditions and a precision manufactured wide tooth profile for smooth operation. The 'D' shaped hole matches the motor shaft profile, ensuring that drive and brakes are not lost if the set-screw backs out. It is suitable for a 5mm motor shaft diameter and comes with a precision manufactured threaded set-screw hole and an E-clip for motor shaft pinion retention.