8in bench grinder wheels

[cspcrx]

Got a new Dewalt 8in bench grinder. turned it on and both wheels wobbled, especially the 60 grit. Took the right side off anyway to install my Trick Tools multi tool sanding adapter so was not worried.

Fired it up all was smooth without the 60 grit installed.

Put the 60 grit back on and shacks badly. wobbles left and right and has some signs of not being round.

Dewalt is sending a new wheel as it also has a chip out of it.

Are there 8in wheels with 5/8 arbor holes that do not have the plastic adapters in them? Seems like there is a lot on the web about that causing the wobble as they never seat the same.

Or would just a better quality wheel, tell me a brand please, not have this issue?

Thanks all and Merry Christmas.

 

[jimreed2160]

Well, to start with, be careful because grinder wheels can explode under stress. I would not use a wheel that had a chip out of it because whatever caused the chip could cause other invisible damage. A better arbor spacer or some shims should fix a wobble. An out of round wheel can be dressed round. I work under the assumption that ALL new wheels are slightly out of round so the first thing I do is dress them.

Good luck with your new grinder. Hope the new wheel works better.

 

[cspcrx]

Thanks not using it until the replacement arrives. My fear is it will not be much better. All I have done is turned it on to see how it ran at this point.

Thanks for the tips is there a shim kit and dressing tool you recommend?

 

[Packard V8]

An out of round wheel can be dressed round. I work under the assumption that ALL new wheels are slightly out of round so the first thing I do is dress them.

Yes, agree, dressing new grinder wheels so they are true in the radial is usually necessary. However, most don't own a real diamond dresser. The star wheel tool will clean an already round wheel, but it is incapable of truing the grinding wheel to the arbor. Buy a diamond dresser.

A better arbor spacer or some shims should fix a wobble.

Axial runout, i.e. "wobble" is different than radial runout. Yes, if one is experienced and patient, spacers and shims can take out wobble, but they are only good as long as the wheel stays exactly where it was shimmed.

Are there 8in wheels with 5/8 arbor holes that do not have the plastic adapters in them? Seems like there is a lot on the web about that causing the wobble as they never seat the same.

Yes, there are better quality 8" wheels, Norton comes to mind. However, the plastic adapters are usually more concentric and on diameter than the Chicom wheels. Buy good wheels and the plastic spacers won't be the problem.

jack vines

 

[cspcrx]

Thank you Packard for your insight. I will get a diamond dresser, I have a cheap dresser that has the wheels on it. I know, from watching to much youtube on the subject now they are not the same.

I will see how the wheel Dewalt sends compares to the one I have. if it is wobbles as much I will just bucks up for a better quality wheel like a Norton. Probably a AO type instead as well since they seem to run cooler.

Thanks again.

 

[jimreed2160]

I use a Wolverine diamond dresser for large 8" wheels. My smaller wheels are fine Norton stones and a diamond tee dresser works great on them.

 

[cspcrx]

That Wolverine system is nice but a lot more than a $10 tee dresser. I know they are not even comparable for what they do and the precision it does it.

Thanks all. Funny as I look at Norton wheels on Amazon lately there have been a lot of complaints about them wobbling or even chipped. Need to find a local place perhaps so I can look at the stone.

 

[ken w.]

I bought my 8" wheel from MSC Industrial. I still had to true it up a bit. It was defiantly better than the one that came with it. I also got a wire wheel too.

 

[EOC_Jason]

Norton makes the best wheels...

These adapters seem to be the best assuming you have a 1" hold in your wheel:

https://www.woodturnerscatalog.com/p/97/6196/Raptor-R3X-Grinding-Wheel-Bushing-2-Piece-Set

I've also seen multi-piece metal sets, here for instance (they are also on eBay):

https://www.amazon.com/dp/B01EE9O616/?tag=atomicindus08-20

But I don't know how well those would work over plastic as any gap will induce wobble.

Personally, I just spend a little time and shim a wheel as necessary to get the side-to-side wobble out. Then dress it with the diamond T-bar to get it round.

To shim I use the little round stickers like you use for garage sale items. I start out hand spinning the wheel to see how bad it is. Mark the wheel or make note of a fixed UP position, this is crucial otherwise you will just be chasing your tail, you want to always rotate the wheel with the same fixed point at the top when you tighten down the nut.

Loosen the nut and turn the outer washer 1/4 turn and re-tighten the nut (by hand is fine). Spin wheel again... Keep turning washer 1/4 turn and figure out which has the least wobble and choose that position.

Next I use a pencil and spin the wheel by hand, I hold the pencil close on the outer edge of the blotter (paper part of the wheel) so that as it wobbles it will mark part of the wheel. Take that pencil line and mark it halfway and you now know the high spot of your wobble.

Easy part now is you use a couple of those stickers and place them in that location under the washer so as to shim it straight. Likewise use some needle nose pliers, rotate the wheel 180-degrees and shim the inside washer the same. (Be careful as you spin everything that your washers are staying in their same position relative to the wheel or you will throw everything off and have to start over).

Now return your wheel to the "up" position, tighten your nut and give it a spin. Shim more as necessary. Once you are happy, give it a little snug with a wrench and enjoy the fruits of your labor.

Do NOT overtighten the nut, maybe people go crazy and all they are doing is mashing down the blotter (the paper on the wheel) and/or bending the washer (if it is stamped), or worst case crack the wheel (and it will explode on spin-up). The nuts are different directions because as the wheels spin they will stay snug.

 

[tarbellb]

Cruise Ebay for NOS (new old stock) wheels, you will find smoking deals on guys who have had them sitting on their shelf for 30yrs.

Good reputable brands are Pferd, Weiler, Osborn, 3M, roll the dice with Norton, SAIT, CGW.

 

[driftpin]

I tried a Home Depot replacement stone for my 8" grinder, and the grinder shook like a ******* top. That one went-back for a refund.

I went to McDonald's Hardware on State Rd. 84 in Ft. Lauderdale, and I ordered a Weiler. Mounted, it spun smoothly, well-worth the additional $ over the Big Box store ****. McDonald's Hardware is probably the closest hardware store to Port Everglades, one of the largest ports in the SE USA, and they carry a lot of fasteners you wouldn't find locally, lots in stainless steel. A good resource if you are in the area, and aren't familiar w/them. http://www.mcdonaldhardware.com/ Info on them, they are helpful in the store:

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Feel free to contact us today for all your hardware needs.

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[EOC_Jason]

Cruise Ebay for NOS (new old stock) wheels, you will find smoking deals on guys who have had them sitting on their shelf for 30yrs.

Good reputable brands are Pferd, Weiler, Osborn, 3M, roll the dice with Norton, SAIT, CGW.

^^^ +1... I have old USA Weiler & Osborn too and those are top notch...

Don't waste your time or money on cheap china / big box store ones...

 

[cspcrx]

Thank you so much guys. I do not us it a tone but I like my tools to perform properly. I saw the various replacement arbors as well as some people using saw blade stabilizers as they are machined vs stamped.

I will look for a quality wheel.
thanks again!

 

[EOC_Jason]

Oh yeah, also before you install any wheel be sure to do a "ring test"...

^^^