Koswork 32P M0.8 21T Lightweight Hardened Steel RC Pinion Gear 5mm Shaft - KOS03000-21

The Koswork KOS03000-21 is a 32P M0.8 21-tooth hardened steel pinion gear designed for RC cars running a 5mm motor shaft. Built from lightweight hardened steel, this RC pinion gear strikes a balance between durability and reduced rotating mass, making it a solid choice for competitive and performance-oriented builds. The inclusion of a high-torque set screw ensures the gear locks securely onto the motor shaft without slipping under load.

Key Features

• 32 pitch M0.8 module specification suits a wide range of 1/10 and similarly scaled RC drivetrains
• 21-tooth count suits mid-range gearing setups where a balance of speed and torque is needed
• Hardened steel construction resists wear from mesh contact, extending gear life under repeated use
• Lightweight design reduces rotational inertia compared to standard steel pinion gears
• High-torque set screw included for a secure, slip-free fit on 5mm motor shafts

Compatible With

• RC cars and buggies using 32P M0.8 pitch spur gears
• Motors with a 5mm shaft diameter
• Typical applications include 1/10 scale on-road, off-road, and touring car platforms using M0.8 gearing

What's Included

• 1x Koswork KOS03000-21 32P M0.8 21T hardened steel pinion gear
• High-torque set screw