Koswork Mod 1 M1 15T Lightweight Hardened Steel RC Pinion Gear 5mm Shaft - KOS03006-15

The Koswork KOS03006-15 is a Mod 1 15-tooth hardened steel pinion gear designed for RC cars and buggies running a 5mm motor shaft. Built from lightweight hardened steel, this M1 pinion gear is engineered to handle the demands of high-performance electric RC drivetrains without the weight penalty of a standard steel gear. The inclusion of a high torque set screw ensures a secure, slip-free fit on the motor shaft, making it a reliable choice for racing and bashing applications alike.

Key Features

• Mod 1 (M1) tooth pitch — compatible with standard Mod 1 spur gears used across a wide range of 1/8 and 1/10 scale RC vehicles
• 15-tooth count suits mid-to-high speed gear ratio setups depending on spur gear pairing
• Lightweight hardened steel construction offers improved durability over brass pinions while keeping rotating mass low
• Precision-bored 5mm bore fits directly onto 5mm motor shafts without modification
• High torque set screw included for a firm, positive lock to prevent slipping under load

Compatible With

• RC cars and buggies fitted with a 5mm shaft motor and Mod 1 spur gear
• Suitable for 1/8 scale and many 1/10 scale electric RC platforms using M1 gearing
• Compatible with brushless and brushed motors with a 5mm output shaft

What's Included

• 1x Koswork KOS03006-15 Mod 1 15T hardened steel pinion gear
• 1x High torque set screw