Prusa i3 Mk3 Bearing Z Axis Top Mount by jlnevill

Last crawled date: 3 years ago

I designed these parts to eradicate the Z axis lead screw wobble and provide better support to rotation.
There wasn't a lot of space to play with, so the design required a change to the T8 Nut lead screw fasteners.
The lead screws sit 5mm inside the bearings and the rods also sit a little deeper. The buttons also provide some bearing purchase to the lead screws
Rod and bearing holes are designed to be a press fit.
Assembly requires stepper motors, rods and lead screws to be parallel / square with the frame (check spacing and frame offsets with callipers).
Also check any cable tie overhangs on the X Carriage as the clearances are tight!
If you get any vibration on the lead screws then check that the Z axis stepper motor mounts are square to the frame.
This design requires two 608 bearings.