Bench grinder- changing wheels

[OldSpool87]

I have (inherited) a Craftsman 1/3 HP bench grinder with 1/2” arbor. I want to change one of the grinding wheels to a wire brush wheel.

How can I lock the arbor to remove the nut affixing the wheel?

I’ve researched and don’t come up with much conclusive other than jamming something in the wheel to lock it up.

Thanks!




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[Scott Douglas]

No, don't jam anything against the wheel, you might break/fracture it without knowing and it'll come apart on you.
That is similar to the one I inherited but I haven't changed a wheel yet.
I think there's a hole along the shaft on the inner side of the wheel you can pin.
Check the housing around the shaft for a hole.

[Scott Douglas]

https://www.garagejournal.com/forum/showthread.php?t=200824

[porsche930dude]

It is frustrating for sure. I grinded two flats on the big washer so i could grab it with channel locks. you cant wedge a wire wheel or a buffer.

[fastfredracing]

I hold the wheel still with my hand, and zip it off with the impact gun. One side should have reverse threads.

[stevej37]

Originally Posted by Scott Douglas

https://www.garagejournal.com/forum/showthread.php?t=200824

Poster #2 & 13 is familiar.

[OldSpool87]

I got it. Used a rag for better grip. Used my big boy muscles and off it came. This was the right side wheel which came if lefty loosey.

Thanks for all the feedback.

[A930Rocket]

+930

Originally Posted by fastfredracing

i hold the wheel still with my hand, and zip it off with the impact gun. One side should have reverse threads.

[sammyg2]

Related topic: when you install a grinder wheel, ya gotta do a ring test by tapping it gently to make sure it is not busticated.
A good solid ring, it's prolly OK ot use. A dull thud, it might be cracked and MUST be removed and inspected prior to hitting the go button. If you pass go and collect $200 and have a cracked wheel you might end up wearing part of the wheel to the hospital or coroner's office. It's happened before and is an OSHA reg, I sheet you not. CFR 1910.215(d)

Mounting -
1910.215(d)(1)

Inspection.
Immediately before mounting, all wheels shall be closely inspected and sounded by the user (ring test) to make sure they have not been damaged in transit, storage, or otherwise. The spindle speed of the machine shall be checked before mounting of the wheel to be certain that it does not exceed the maximum operating speed marked on the wheel. Wheels should be tapped gently with a light nonmetallic implement, such as the handle of a screwdriver for light wheels, or a wooden mallet for heavier wheels. If they sound cracked (dead), they shall not be used. This is known as the "Ring Test".
1910.215(d)(1)(i)

Wheels must be dry and free from sawdust when applying the ring test, otherwise the sound will be deadened. It should also be noted that organic bonded wheels do not emit the same clear metallic ring as do vitrified and silicate wheels.


1910.215(d)(1)(ii)

"Tap" wheels about 45 deg. each side of the vertical centerline and about 1 or 2 inches from the periphery as indicated by the spots in Figure O-25 and Figure O-26. Then rotate the wheel 45 deg. and repeat the test. A sound and undamaged wheel will give a clear metallic tone. If cracked, there will be a dead sound and not a clear "ring."

It's amazing how much stuff can get stuck in a person's head in a 38 year career.
They say all OSHA regs are written in blood. IOW just about every OSHA law was written as a result of someone getting kilt.

[sammyg2]

Here's another: how many of us have used a finger to reach into a socket and pull the nut out of it, while the socket was attached to an impact gun? Show of hands? All of us? OK, not surprising.
What could possibly go wrong?

This pic was lifted off the interwebs but I actually saw a co-worker thread his finger past the 2nd joint with a 3/4" die nut. It was really .... bad.

[John Rogers]

Those posts of the accidents are right on, always unplug the grinder if changing wheels, unhook the air source on a jammed impact wrench, take the time to put on those safety glasses/goggles in the drawer over there, ETC, ETC.

[sammyg2]

One of my duties over the years was to to conduct weekly safety meetings in hopes of preventing an injury or worse.

One thing I heard over and over: "I've been doing this for XX years and never got hurt doing that".

My canned comeback is this:
In the movie The Magnificent Seven, Steve McQueen has a good line .....

Reminds me of this fella I used to know. Fell off a five-story building. Passing each floor on the way down, people inside heard him say : "So far, so good!" He's dead now.

[porsche930dude]

I had a wheel come apart once it was pretty violent. I didnt expect it because it doesnt often happen on the bench grinder but i was glad i was wearing my full face shield.