GPM Racing 40CR Steel Motor Gear 13T (Module:0.5mm,motor Tooth Diameter:2.2mm) (MG213T/0.5M)

13T hardened 40Cr motor pinion for small electric drivetrains

This 13-tooth pinion is designed as a replacement for compatible electric RC drivetrains. It is made from 40Cr steel with a hardened black finish, specified as 13 teeth with a 0.5mm module and a round 2.2mm motor bore, and is located on the motor shaft using two 3x3 set screws.

In practical operation the pinion forms the interface between motor shaft and spur or primary gear, offering a compact, durable drive point. Confirm the motor accepts a 2.2mm bore pinion and that the driven gear uses a 0.5mm module before installation. Fit the gear with the drivetrain assembled, confirm concentricity, and tighten the set screws evenly to achieve the correct mesh.

For gearing adjustments and maintenance the pinion allows you to swap tooth counts while preserving tooth profile and wear patterns. The hardened 40Cr construction aims to improve wear resistance relative to softer materials, helping the part endure normal RC drivetrain stresses.

How do I confirm module and bore compatibility?

Measure the driven gear module to ensure it is 0.5mm and the motor bore diameter to confirm 2.2mm; only matching dimensions will give correct gear engagement.

What installation steps reduce vibration?

Seat the pinion on a clean shaft, check alignment with the driven gear while assembled, and tighten the two 3x3 set screws alternately to keep the pinion concentric and minimize vibration.

Is hardened 40Cr suitable for frequent gear swaps?

Yes; the hardened 40Cr material is robust for repeated use and gear changes, but longevity still depends on correct mesh, load, and routine inspection. Write Product Review Please sign in your account before you can write any review. Sign In Close

Made to order: GPM Racing parts are shipped to us from GPM's factory, so please allow around 14 days for dispatch.