Question about Sears Rockwell 8 in. 3/4 hp, 5-amp Bench Grinder

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How do I change a brush? I can't get the axle locked to get the nut off. Can you help me?

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Remember if you are trying to change the left side it is a reverse thread nut. You would turn it clockwise to loosen. IF it is very tight, put a wrench on both sides. IF the right side comes loose, remove brush/grinding wheel, and re-install nut, with an extra nut locked to the first one, the put a wrench on both sides again.

Posted on Oct 01, 2010

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There is a left handed thread and a right handed thread on the arbors.

Removal
Right Hand Side (RH)
Wrap a piece of rubber or leather around the threads on the LH side of the arbor & hold with pliers, while turning the RH nut CCW.

Left Hand Side (LH)
Wrap a piece of rubber or leather around the threads on the RH side of the arbor & hold with pliers, while turning the LH nut CW.

Installation
Note: Hand tighten the nut, then 1/4 turn.

Right Hand Side (RH)
Wrap a piece of rubber or leather around the threads on the LH side of the arbor & hold with pliers, while turning the RH nut CW.

Left Hand Side (LH)
Wrap a piece of rubber or leather around the threads on the RH side of the arbor & hold with pliers, while turning the LH nut CWW.

For grinding stones:

  • ring test the stone
  • discard the stone if it has been dropped
  • be sure the paper washers are installed on the wheel

GRINDER SAFETY 101 (graphic injury video so be warned)
http://www.garagejournal.com/forum/showthread.php?t=263083

Posted on Feb 25, 2016

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