TM680/TOM680 Rotary Encoder Knob
thingiverse
This is a replacement rotary encoder knob for the TM680/TOM680 keyboard. There are three different versions: regular cylinder, filleted cylinder, and chamfered cylinder. The knob's outer diameter is approximately 19.5mm, and the stem diameter (D-shaped) is approximately 6mm. As printed on my printer, the knob fits snuggly on the TM680's stem, but not as snuggly as the stock knob (which I often had difficulty removing).
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