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Changing wheels on a bench grinder

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Forum topic by Brett posted 912 days ago 7061 views 0 times favorited 10 replies Add to Favorites Watch
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Brett

621 posts in 1309 days


912 days ago

I need to change the wheel on my bench grinder. I’ve remove the shield around it and am ready to loosen the nut that holds the wheel in place. The problem is that I can’t figure out how to keep the wheel from rotating while I loosen the nut. On a lawn mover or circular saw I can brace the cutting blade with a piece of wood, but a grinding wheel is smooth so there’s nothing to stop it turning. Is there a “trick” to doing this, or should I just hold on the best I can with one hand while using a wrench to loosen the nut with the other hand?

-- More tools, fewer machines.


10 replies so far

View saddletramp's profile

saddletramp

994 posts in 1265 days


#1 posted 912 days ago

I generally hold the opposite wheel while I loosen the nut.

-- ♫♪♪♫♫ Saddletramp, saddletramp, I'm as free as the breeze and I ride where I please, saddletramp ♪♪♪♫♪ ...... Bob W....NW Michigan (Traverse City area)

View Bill White's profile

Bill White

3404 posts in 2587 days


#2 posted 912 days ago

Hold the other wheel or hold the wheel to be changed with a rag/shop towel jambed against the tool rest.
Don’t get too rough with the job and, when the old wheel is removed, ya might wanna lube the grinder shaft with an anti-sieze compound. Do not over tighten the nut when installing the new wheel. Normal spin will keep the nut tight.
Bill

-- bill@magraphics.us

View mveach's profile

mveach

56 posts in 1009 days


#3 posted 911 days ago

If the nut has become very tight, just tap the wrench with a mallet. I also ring a new stone before installing it. Put a nail or other metal object through the boor and tap the stone on the side lightly with another small metal object. An old timer showed me this many years ago and I still do it every time I change the stone.

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TopamaxSurvivor

14721 posts in 2302 days


#4 posted 911 days ago

mveach, What is that supposed to do?

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View WoodKutter's profile

WoodKutter

29 posts in 2094 days


#5 posted 911 days ago

Remember also that the right wheel has right hand threads and the left wheel has left hand threads. I hold the other wheel with my hand also. Doesn’t always work, just most of the time.

mveach is correct about ringing a wheel. when tapping the wheel lightly, you want to hear a nice ring to it. If it sounds dull or flat, the wheel has a fault in it and may come apart during use.

View Danpaddles's profile

Danpaddles

534 posts in 938 days


#6 posted 911 days ago

I always stand off to the side when I mount a wheel, the first time I power up. Either a new, stone or one that has not been used for a while. The bond that holds the grit together can be attacked chemically, or physically.

-- Dan V. in Indy

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TopamaxSurvivor

14721 posts in 2302 days


#7 posted 911 days ago

How do you tell if you can’t hear those sounds? ;-((

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

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ksSlim

972 posts in 1516 days


#8 posted 911 days ago

^Topa…don’t stand in front of the grinder so as not be be there when the wheel flies apart.
Otherwise it takes a looong time to typ without stakes.

-- Sawdust and shavings are therapeutic

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TopamaxSurvivor

14721 posts in 2302 days


#9 posted 911 days ago

I don’t stand directly in line with anything when it starts up, especially large amp electrical switches or any 480 device. Saved me a lot of grief more than once ;-))

As a side note; a fellow I once did work for was standing in front of a 480 volt motor starter that was tripping a circuit breaker. He reset it and tried it, it tripped. He did it again and it tripped. He did it again, the starter blew up, the door flew open and took off a little piece of his ear! He was very lucky!

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Brett's profile

Brett

621 posts in 1309 days


#10 posted 911 days ago

I didn’t realize the left wheel uses a left-hand thread. It seems like I should be able to use one wrench to hold the nut on one side while I loosen the nut with another wrench on the opposite side.

-- More tools, fewer machines.

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