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WHICH WAY DO THREADS ON MAINSHAFT RUN

Trying to disassemble an old bench grinder to replace disc and brush. but not sure whicy way the threads on mainshaft go. on the brush side(right side). it is regular thread, counter-clockwise to loosen. not sure on disc side(left). this is an old reliable bench grinder(40+years old). with new disc and brush it could give me many years more service.brand unknown as motor/brand plates have erased by now.

thanks
gilberto rodriguez
gil.rodriguez@acm.org

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Look at rotation. The opposite of each end will be the way to loosen it. that way as it rotates the nut will tighten

Posted on Sep 13, 2009

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If the right side is a right-hand thread, the left side is opposite that -- left hand thread.

Charlie

Posted on Sep 13, 2009

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1 Answer

How to put on a wire brush on a craftmans 6 inch bench grinder 21126


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:
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  • 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

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

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http://www.garagejournal.com/forum/showthread.php?t=263083

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