Quote Originally Posted by tonyfoale View Post
It looks like you have some form of flywheel on the spindle underneath the pulley.
What is below the pulley in the photo, is a Cast Iron Disc for the spindle Brake, The only backlash, you should see with your spindle is with the splines, that go up through the mating drive splines, the Back gear is a belt drive, so you should not have any backlash with that part, If the Vari-drive pulleys are worn they can have a lot of backlash, there are some plastic bushings & keys that can be replaced in the Vari-drive pulleys, the spindle can stop very fast, this depends how & what VFD Drive you are using, & the settings used