TM680/TOM680 Rotary Encoder Knobs

These are replacement knobs for the TM680 keyboard. There are three versions: regular cylinder, filleted cylinder, and chamfered cylinder.

The knob's outer diameter is 19.5mm, and the stem hole (D-shaped) diameter is approximately 6mm.

As printed on my printer, they fit snuggly on the TM680, but not as snuggly as the stock knob, which I often had difficulty prising from the stem.