I needed some simple knobs and no time to get to an electronics store, so here is my 3D print design. The knob is designed to fit a 6mm potentiometer shaft. The knob has a 12mm base and has a height of 13mm, not including the indicator marking.

The knob is held in-place by an M3 threaded brass insert, 1.5mm long. Carefully fit the brass insert with a heat source such as a soldering iron.

I hope that you can find this print useful, too.

Remember to leave me some feedback or even a tip to keep me enthused to make more of these drawings.

Print instructions

To make the print result more interesting, I do a filament colour swap near the end so that the raised text is printed in another colour and make it more visible. The filament colour swap is setup in your slicer software. Setting up the filament colour is easy in PrusaSlicer, other slicers probably, too.

My print is made in PETG 1.75mm Aurarum black and white filaments, with 0.2mm layer height and 20% infill on a PRUSA I3 MK3S printer.