This is the smaller of the two star-shaped knobs on your grinder head. It secures the end cap and main shaft bearing to the cutting barrel, keeping the shaft supported and running true. Tool-free by design, which also makes it the easiest part to set down and lose mid-teardown, so having a replacement medium tension knob for your industrial cannabis grinder ensures your pre-roll production never stops. Diagram: P/N MS-041-B
