ARA310968 Safe-D5 Mod1 Pinion Gear (21T)

The Arrma 21T Mod1 Safe-D5 Pinion Gear is a replacement pinion gear made for RC vehicles that use a Mod1 gear pitch and a 5 mm motor shaft. It is made from tough steel for durability in demanding driving conditions and has 21 teeth to mesh with a matching spur gear for smooth power transfer. The gear’s bore is D‑shaped (Safe‑D) so it keys to the motor shaft, helping maintain drive and braking even if the set screw loosens. It includes one set screw (M4 × 4 mm) and one E‑clip (3.2 mm) for secure attachment to the motor shaft, and the precision‑manufactured tooth profile promotes reliable operation in hobby and RC applications. 

Includes

1 x 21T Mod1 Safe-D Pinion Gear

1 x Set Screw - M4 x 4mm

1 x E-Clip - 3.2mm

Features

Strong and durable steel for long-lasting performance in extreme RC conditions - Precision manufactured wide tooth profile for smooth operation - 'D' shaped hole to match motor shaft profile so drive and brakes are not lost if the set-screw backs out - Suits 5mm motor shaft diameter - Precision manufactured threaded set-screw hole - E-clip supplied for motor shaft pinion retention