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Old 7th July 2022, 10:39   #1
macafee2
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I have a bench grinder. The left wheel is held on by a left hand threaded nut, the right wheel by a normally threaded nut.

When you tighten one nut, you loosen the other. There is no spindle lock for tightening the nuts.

I must be missing something but goodness knows what.

I am normally quite good understanding nuts and bolts but this has left me stumped.

Perhaps when spinning this is good but for tightening it does not work.

macafee2
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Old 7th July 2022, 11:27   #2
BRG75
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You might find a pair of flats on the shaft, if not then the norm. is to make sure that the grinder is electrically isolated (if possible) and if not that it won't / can't be accidentally switched on.

Then grasp the relevant wheel and nip up the nut. It does not need to be excessively tightened.

It might tighten itself up a little, in use.

The safety aspect is "designed" in, by using handed threads.

Mike
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Last edited by BRG75; 7th July 2022 at 11:29.. Reason: grammar
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Old 7th July 2022, 12:07   #3
macafee2
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Quote:
Originally Posted by BRG75 View Post
You might find a pair of flats on the shaft, if not then the norm. is to make sure that the grinder is electrically isolated (if possible) and if not that it won't / can't be accidentally switched on.

Then grasp the relevant wheel and nip up the nut. It does not need to be excessively tightened.

It might tighten itself up a little, in use.

The safety aspect is "designed" in, by using handed threads.

Mike


Hi Mike,
no flats, surprised by that. The grinder is via a 3 pin plug so can be made safe. Totally understand the safety issue when spinning but I would have expected to find a spindle lock or as you say, flats.

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