40Cr Steel 21T Motor Gear MG221T/0.5M (Module 0.5mm, 2.2mm Tooth Dia) by GPM [MG221T/0.5M]

40Cr Steel Motor Gear 21T ( Module:0.5mm, Motor Tooth Diameter:2.2mm) - GPM MG221T/0.5M

Price:

£5.87

Brand:

GPM

Model:

MG221T/0.5M

GTIN:

4894538411560

Condition:

Brand New

Color Available:

Quantity:

Write a review

Description
FAQ

Motor pinion specifications

Made from 40Cr steel, this 21-tooth motor pinion matches a 0.5mm module and a motor tooth diameter of 2.2mm, making it suitable for small electric RC gearsets. The round bore accommodates a pair of 3x3 set screws for secure retention and the black heat-treated finish improves surface hardness for longer operational life.

Installation guidance: double-check shaft and gear dimensions prior to purchase so the module and tooth diameter align with your spur gear. Fit the pinion so it sits flush, and progressively tighten both set screws to preserve concentric alignment and reduce running vibration.

Which shaft and set-screw arrangements does this pinion require?

The pinion is designed for a round motor shaft secured with two 3x3 set screws. Confirm your motor accepts a 2.2mm motor tooth diameter pinion at 0.5mm module to ensure correct engagement.

What checks should I do after fitting to ensure reliable operation?

After installation, rotate the drivetrain by hand to check for binding and listen for tooth contact noise. Recheck mesh, tighten set screws evenly, and inspect for any shaft eccentricity that could cause vibration.