NEMA press-fit gear puller

Puller for removing press-fit gears and bearings from NEMA stepper motors without destroying the gear or the motor.

I needed to remove the timing gear from an Ender3 stepper and couldn't find anything that worked - so I designed this simple tool.

You need 3x 30mm M4 bolts with 4x M4 nuts, preferably hex drive as you need to put in a lot of torque.

Two of the bolts are used to add strength to the print, as I found with the amount of torque needed I was de-laminating the part around the captive nuts.