Simply pull off old one and slide new one on.

 

  The clutch is a pressure activated speed control for the Electric Mandrel Spinner.  It should last a very long time.  They don't usually wear out, but it is rubber and could burn if it gets extrememly hot.  This is very rare as you are using your fingertips to control the speed by resisting the rotation of the Spinner axle.  Your skin will burn at a much lower temperature than the rubber, so it takes a serious lapse in attention in order to ruin a clutch.  If the clutch starts to get warm, you simply slide the mandrel out a little.  This positions the glass and flame further from the clutch making you more comfortable.