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Grinder Wheel Quality

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Anonymous-0

Well-known Member
I will be buying a 60 grit 8" grinder wheel soon. Are there varying degrees of quality wheels? Some seem awfully soft, and don't last long. I want a good one.


Thanks,
Glenn F.
 
Whether a wheel is hard or soft is not a matter of quality but what it's intended to grind. Harder the steel the softer the wheel. If it's for general shop use like structural iron, Hot or cold rolled steel get a harder wheel. Look at the code on the label. The number before the dash and the letter after. Number indicates the grit size and the letter is hardness. 40 to 60-K or -J is good for soft steel. -G or -H in a finer grit is better for sharpening drills and cutting tools.
 
"Whether a wheel is hard or soft is not a matter of quality"

Mike, I"d venture to guess no one has pawned off one on you yet that was made in "The Land of Almost Right"!

I knew better, but recently I needed one RFN and picked one up at TSC.

SHORT version, it's pretty "soft"!
 
Hmm, I think the ones from TSC are pretty good. Both their house brand and the Dewalts. You can use them right down to the hub and they'll still remove material.

ANYTHING is better than the ones at Harbor Freight. You can see right on them that the grit is only on the outside rim of the disk. Once that grit is worn off, they won't cut BUTTER. You can reef and romp on them until the grinder burns up, and they won't even make a mark. What's funny is they won't wear down any more either.
 

Seriously don't waste the money on Horror Fright 7" wheels regardless of their rating. Well, just buy one and try it then decide. The best bet is to locate a welding supply store and select wheels within the rpm of your grinders rating and also for the material you are working with.

I made the mistake only once of buying the HF cheapies....Good luck.
 
OK Bob. I knew I would get some flack on this when I posted it. Truth is I have never been in any HF store. Since Glenn F. didn't say what he would be grinding and what kind of grinder, I offered general info I thought might help. My comments are based on nearly 30 years of tool and die work and thousands of hours at grinders. Perhaps I was a little too technical.
 
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ALL is well, Mike!

I wasn"t trying to irritate you and the grinding wheel in question was NOT from HF, but rather from TSC.

I thought my recent experience had SOME relation to this thread, as that was a new experience to me to buy and use such a worthless grinding wheel, and I"ll wager it"s pretty much a sign of the times!

SORRY!
 
No offense taken, Bob. I was thinking wheels mounted to a pedestal grinder. Round thing with a hole in the center. If we're talking angle grinders then yeah, quality will vary with price.
 
Thank you for your offer Gordo. I am unable to PM you as I am not currently a YT member, (I 'm working on that). If you wouldn't mind calling me at (920) 360-9704.

Thanks,
Glenn F.
 
You will find that there is a place for every type of wheel. Sometimes those cheap wheels actually grind faster while creating less heat and vice versa. The letter designation commonly refers to the hardness of the adhesive. The harder the wheel the more heat it takes to release the grit to form a new cutting edge. You also will find wheels with a Z or ZA (for aluminum) designation meaning it uses zirconium as a grinding grit. The Zirconium will fracture several times providing new cutting surfaces for each piece of grit. Usually they have a higher designation for hardness of the adhesive so you really need to lay into it if you think it isn't grinding fast enough. This will allow dulled grit to either be released or fracture the grit for ne cutting surface. Norton offers some of the Zirc wheels or Metabo wheels offered through Fastenal. The Metabo wheels will out last many cheap wheels
 
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