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Grinding wheel not round

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Forum topic by Gpag posted 03-24-2019 10:23 PM 472 views 0 times favorited 11 replies Add to Favorites Watch
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Gpag

10 posts in 401 days


03-24-2019 10:23 PM

Topic tags/keywords: sharpening wheel balance grinder question

My new grinding wheel is not round. When I rotate it to start it slowly turning it always turns back and forth until the same heavy spot is at the bottom. I started to dress it to get it round but I’ve stopped because I figure it will sort itself out as I sharpen tools, so why take material off the wheel unnecessarily. Do you see any problem with just leaving it?
FYI, I’ve adjusted the wheel flanges to remove any wobble.
Thanks,
George


11 replies so far

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Lazyman

3228 posts in 1719 days


#1 posted 03-24-2019 10:27 PM

Are you sure that the hole is the same size as the arbor? It sounds to me like you have a 5/8” hole and 1/2” arbor, for example. Many grinding wheels come only in one size and provide shims for smaller arbors.

Edit: as soon as I hit save remembered the term. It is not a shim but a bushing to adapt to smaller arbors.

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

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GR8HUNTER

5839 posts in 1044 days


#2 posted 03-24-2019 10:58 PM

i agree with Nathan something does not seem right if it were me i would not use it :<(((((((((((((

-- Tony---- Reinholds,Pa.------ REMEMBER TO ALWAYS HAVE FUN

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Gpag

10 posts in 401 days


#3 posted 03-25-2019 12:22 AM

The wheel has plastic bushings to fit the arbor. The bushings are snug. No play in the wheel on the arbor.

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BlasterStumps

1271 posts in 771 days


#4 posted 03-25-2019 01:00 AM

I had one similar. It was out of balance but just. I put it on a 1750 RPM motor and used a concrete rub brick to balance it. I ring tested the wheel first.

-- "I build for function first, looks second. Most times I never get around to looks." - Mike, western Colorado

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gwilki

284 posts in 1805 days


#5 posted 03-25-2019 12:37 PM

If it’s really out of round and not out of balance, I would use a dresser and round it rather than having my tool bounce around while trying to sharpen it. If it’s out of balance, Oneway makes a balancer that fixes that, but it’s not cheap.

-- Grant Wilkinson, Ottawa ON

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Lazyman

3228 posts in 1719 days


#6 posted 03-25-2019 01:32 PM

If it is a new wheel or grinder, I would take it back and get a new one. Verify that it’s not the bushing that is messed up, possibly because it is plastic and the wheel is out of balance. What is the maximum distance in and out that it is off?

-- Nathan, TX -- Hire the lazy man. He may not do as much work but that's because he will find a better way.

View Richard's profile

Richard

11274 posts in 3364 days


#7 posted 03-25-2019 10:25 PM



If it s really out of round and not out of balance, I would use a dresser and round it rather than having my tool bounce around while trying to sharpen it. If it s out of balance, Oneway makes a balancer that fixes that, but it s not cheap.

- gwilki

I agree with Grant^^^

-- Richard (Ontario, CANADA)

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Gpag

10 posts in 401 days


#8 posted 03-26-2019 12:06 AM

I checked with a dial indicator but forget the measurement. I won’t be back at the machine for a few days. It is not so bad that the tool being sharpened bounces around. Next time I’m at the grinder I’m going to remove the flanges and see if the wheel still rotates own it’s own. This is a two wheel Baldor grinder,not a cheapo model. The bushings seem fine,nice and tight. It is not a brand new wheel. I have used it some. I just happened to check it when I was adjusting things to remove some side to side wobble. That is now fine.

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OSU55

2209 posts in 2321 days


#9 posted 03-26-2019 01:12 AM

If you have any smaller wheel weights or a scale good enough to measure grams you can check how much out of balance it is by removing the other wheel and taping weights to the one, on the OD. Ive done it before with a new wheel and with that info the mfr sent a new one. Mine was pretty severe, but it did pass the ring test.

It is best to dress the wheel round. The out of round will get worse not better.

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HokieKen

8944 posts in 1470 days


#10 posted 03-26-2019 12:36 PM

If it’s a tight fit on the arbor, dress the wheel to round first. Then worry about the balance once you’re sure the wheel is round and concentric to the arbor.

-- Kenny, SW VA, Go Hokies!!!

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bilyo

611 posts in 1434 days


#11 posted 03-27-2019 11:49 PM

I bought some grinding wheels a few years ago and had a similar problem. The issue turned out to be lousy plastic center bushings. I couldn’t fix it any other way, so I ended up turning some out of hardwood on the lathe. I still had to do some dressing, but not much.

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