MG221T/0.5M 40Cr Steel Motor Gear 21T (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:

CAD$11.10

Brand:

GPM

Model:

MG221T/0.5M

GTIN:

4894538411560

Condition:

Brand New

Color Available:

Quantity:

Write a review

Description
FAQ

Pinion gear details and construction

This 40Cr steel motor gear is a compact pinion intended for direct motor-to-spur drive in small electric RC models. It provides 21 teeth at a 0.5mm module and fits motors with a 2.2mm motor tooth diameter. The round bore accepts a two-set-screw 3x3 retention and the black heat-treated surface improves wear resistance and surface hardness for longer service life under normal model use.

Fitment notes: confirm your motor shaft diameter and gear mesh specifications before ordering, since the module and tooth diameter must match the spur gear for reliable engagement. During installation make sure the pinion sits square on the shaft and tighten the two set screws evenly to keep the gear concentric and reduce vibration.

Which motors accept a 21T, 0.5mm module pinion like this?

Any motor that is specified to take a 21-tooth pinion at 0.5mm module with a 2.2mm motor tooth diameter and which has a round shaft compatible with two 3x3 set screws will work. Always measure the shaft and tooth diameter to confirm fitment before purchase.

How do I check and set correct mesh with the spur gear?

Mount the pinion on the motor, position the motor so the pinion meshes with the spur, then adjust until there is minimal backlash without binding. Tighten the two set screws gradually and recheck concentricity to avoid wobble or premature wear.