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

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

Price:

USD$7.90

Brand:

GPM

Model:

MG221T/0.5M

GTIN:

4894538411560

Condition:

Brand New

Color Available:

Quantity:

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Description
FAQ

Motor pinion for small RC models

This 40Cr steel motor gear is an RC-scale pinion designed for direct motor-to-spur transmission in small electric models. The gear features 21 teeth at a 0.5mm module and a motor tooth diameter of 2.2mm, with a round motor hole sized for a two-set-screw 3x3 retention. A black heat-treated surface improves wear resistance and surface hardness for longer service life under typical model running conditions.

Fitment and tuning role: verify your motor shaft dimensions and gear mesh parameters before purchase, because correct module and tooth diameter are required for reliable engagement with the spur gear. When installed, ensure the gear seats squarely on the motor shaft and the two set screws are tightened evenly to maintain concentricity and reduce vibration during operation.

What motors are compatible with this pinion?

Any motor that accepts a 21T, 0.5mm module pinion with a 2.2mm motor tooth diameter and a round shaft secured by two 3x3 set screws can be used, confirm dimensions before buying.

How should I check mesh and fitment?

Mount the pinion on the motor shaft, position the motor for proper mesh with the spur gear, and ensure the set screws hold the gear concentrically; adjust motor position to avoid binding or excessive backlash.