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Grinding wheel not round

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Forum topic by George Pagliarulo posted 03-24-2019 10:23 PM 686 views 0 times favorited 11 replies Add to Favorites Watch
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George Pagliarulo

19 posts in 874 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

-- George Pag


11 replies so far

View Lazyman's profile

Lazyman

5655 posts in 2192 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.

View GR8HUNTER's profile

GR8HUNTER

7658 posts in 1517 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

View George Pagliarulo's profile

George Pagliarulo

19 posts in 874 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.

-- George Pag

View BlasterStumps's profile

BlasterStumps

1703 posts in 1244 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've been through the desert on a horse with no name." So name the damned horse already!

View gwilki's profile

gwilki

355 posts in 2278 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

View Lazyman's profile

Lazyman

5655 posts in 2192 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

11309 posts in 3837 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)

View George Pagliarulo's profile

George Pagliarulo

19 posts in 874 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.

-- George Pag

View OSU55's profile

OSU55

2651 posts in 2794 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.

View HokieKen's profile

HokieKen

14503 posts in 1943 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!!!

View bilyo's profile

bilyo

1133 posts in 1907 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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