MG520T/0.5M 45CR Steel Motor Pinion 20T (48 Pitch Module 0.5mm) by GPM  [MG520T/0.5M]

Price:
USD$6.90
Brand:
GPM
Model:
MG520T/0.5M
Condition:
Brand New
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Product Summary for Pinion Replacement

This motor pinion is made from 45CR steel and intended as a direct substitute where the specified dimensions match. The gear features 20 teeth (20T), a 48 pitch profile with module 0.5mm, plus a rounded motor hole sized for motors with a 5mm motor tooth diameter.

Key setup values include a total thickness of 10mm, tooth face thickness of 5mm, and tooth face outer diameter of 12mm — useful when confirming mesh and motor shaft alignment. Verify mesh clearance against your spur gear before running.

Installation pointers: seat the rounded hole on the motor boss, secure with the supplied screw shaft, set axial position for correct mesh, and re-check engagement after a short break-in run. This part is for electric scale RC models and not for real vehicle applications.

Packing includes

  • Motor Gear 20T - 1pcs
  • Screw Shaft 3x3 - 1pcs

Does this pinion suit a 5mm shaft motor?

Yes; the rounded hole is intended for motors that specify a 5mm motor tooth diameter. Confirm full seating on the motor boss before final tightening.

How should I monitor wear on this pinion?

Inspect the tooth faces and check mesh regularly, especially in high-power applications. Replace the pinion if you notice significant tooth rounding or increased backlash.

Any quick checks after fitting?

Hand-rotate the drivetrain to confirm smooth engagement, then perform a short low-speed run and re-check axial position and set screw tightness to ensure stable mesh.