I lost the knob to my old Harmon/Kardon 2.1 desktop speakers years ago, now that I have a 3D Printer I thought it was time to replace it.

This is a very simple knurled cylinder knob (brushing up on/learning Fusion 360) that just slides onto the D shaft from the potentiometer.

Printed with 100% infill and .08 layer heights to preserve the knurling. Was a roughly 20 minute print for me. Drops to 10 with rougher layers, but the knurling ends up as more of a vague texture.