Bafang motor M620 /G510 third steel gear(new version available)

Bafang Ultra Motor metal gear/bearings for replacement;

Bafang has upgraded the gear, it is metal gear rather than nylon gear. 

Two end bearings(6000RS) are 10mm inner diameter,  26mm outer diameter and 8mm in thickness;

The big steel gear is about 53mm in diameter; the small metal gear is about 27.5mm in diameter;

It's the third steel gear of the Bafang Ultra motor.

Bafang upgraded the M620 G510 rotor and the third gears this year to reduce the motor noise. The two rotors are the same with sizes; only the teeth are different; The two third steel gears are also different with teeth numbers, please check our pictures.  If your motor was sourced before 2023, then your motor would be with the old version rotor and the 3rd steel gear; if your motor was sourced this year, please check before ordering or buy the rotor and the 3rd gear together.  

If you want to reduce noice for your Bafang M620 motor, you can try to replace to the new rotor and the new third gear.

Bafang Ultra Motor third metal gear/bearings for replacement.

Bafang use nylon gear for Ultra motor before, but now they use metal gear for the G510 ultra motor. The same dimension, different material for the gear.