I just bought a 8" bench grinder from Harbor Freight to clean up some automotive parts with a wire wheel. On the left side of the grinder has a left hand threaded nut on it, while the other side has a right hand threaded nut. If I use two wrenches and try to tighten one side the other side will loosen. No matter how much I try this loosing/tightening thing keeps going back and forth. There is no special tool included and there doesn't seem to be a good place to hold the shaft in-place. Is there some special trick to get these wheels attached and secured?

  • 2
    Whomever voted to close, remember that we have had questions about tools asked on here before, most recently about breaking a ratchet due to hammering on it ... Commented Mar 9, 2015 at 23:59
  • The hand-held grinders I have used have generally had a button that pushes a mechanical pawl in to lock the shaft - I presume this doesn't?
    – Nick C
    Commented Mar 10, 2015 at 10:33
  • It doesn't have a locking button or mechanism. Commented Mar 10, 2015 at 16:22

1 Answer 1


I am not sure if OSHA would approve but the method I use is to wedge a screwdriver between the toolrest and the wheel. Then tighten the nut. It doesn't need to be jammed in real tight just enough to snug up the nut.

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .