Breakdisc Extruder indicator knob

This is an knob/handle that fits on flattened shafts with dimensions 5,0x4,5mm.

There are two versions. One with a diameter of 30mm and on with 40mm. The 30mm Version has a very thight fit on the shaft, so maybe you have to scale it slightly.

The design was inspired by the older Formula Oro break discs.

A Brim (also in the inside) is recommended to give a better adhesion to the thin spokes.