Keep your grinder head locked down. The large tension knob is the four-lobe star knob that clamps the cutting barrel assembly to the motor housing. It’s the fastener you use when breaking the machine down for cleaning. This is a key piece that gets hand-tightened dozens of times a week and having a replacement large tension knob for your industrial cannabis grinder is key to keeping your pre-roll production line pumping out high-quality pre-rolls. Diagram: P/N MS-040-C
