My Impulse Drive does not spin smoothly. How can I fix this?

My Impulse Drive does not spin smoothly. How can I fix this?

There are a few reasons why an Impulse Drive doesn't spin smoothly:
  1. It needs cleaning (see other maintenance tips at end of this video
  2. The main spindle of the impulse drive is offset

  3. The drive cover is too tight 

The video below shows how to fix this problem by tapping and re-aligning the spindle part.   Your spindle should spin smoothly when realigned or tightened together within the cover housing.