Motor Pinion MG320T/0.5M — 20T 40Cr Steel (0.5mm Module, 3.175mm Bore) by GPM  [MG320T/0.5M]

20T pinion for 0.5M module motors

This 20-tooth motor gear is machined from 40Cr steel as a replacement pinion for small electric motors that require a 0.5mm module and a 3.175mm bore. The round motor hole is sized to accept the shaft and is retained with two 3x3 set screws.

Material and finish: produced from durable 40Cr steel and given a hardened black surface treatment to resist wear in transmission use.

Fit notes: verify your motor specifies a 0.5mm module and a 3.175mm motor tooth diameter before ordering. Motors outside these specs may need machining or will not fit.

Installation guidance: ensure the pinion seats fully on the shaft, then secure both 3x3 set screws. After fitting, check mesh with the spur gear and adjust to correct backlash.

Use case: a straightforward steel pinion choice for replacement duties or small gearing swaps where increased durability is desired.