Looking for the most aggressive diamond cup wheel for angle grinder

[SALIV8]

Can anybody vouch for one? There’s so many options.

I need to remove a 3/16” high concrete ridge about 10’ long and 8” wide so the most aggressive wheel is what I think I need. I believe the less segments the better.

I have an angle grinder on hand and reluctant to rent a floor machine at this point.

 

[Justind97]

There are 7" ones that will take it down pretty quick. Only thing is they are fairly expensive, $225cdn, so $180us...

Maybe you can rent a 7" angle grinder and cutting wheel?

 

[SALIV8]

Thanks. I’ll see what options are around for rental of the 7” but I always need another tool. Lol.

 

[Armorpoxy]

Hi, our Floor Prep Division buys a lot of tooling from this company. Don't attempt this with a 4", use a 7". They offer down to #16 which is very aggressive. Make sure to use a dust shroud and vacuum as these babies will throw off a ton of dust, and make sure to wear proper respirator.

https://sasecompany.com/7-cup-wheels.html

 

[Hayden]

You may be done already based on the date, but that's really not that big of a project. I did something similar with a 4" RIDGID diamond cup wheel that was like $40 along with a cheap dust shroud that connects to a vacuum.
The whole thing was quite bit easier and cleaner than I expected.

 

[SALIV8]

Thanks guys for all the info.

I’m in the middle of the project. Bought a harbor freight 7” Bauer 15amp grinder and their diamond cup wheel and getting at it.

So far so good. Letting the machine work at its own pace seems better than pushing down and forcing.

Also bought a knock off dust deputy and cheap dust shroud. Helps a ton.

 

[rlitman]

Thanks guys for all the info.

I’m in the middle of the project. Bought a harbor freight 7” Bauer 15amp grinder and their diamond cup wheel and getting at it.

So far so good. Letting the machine work at its own pace seems better than pushing down and forcing.

Also bought a knock off dust deputy and cheap dust shroud. Helps a ton.

Going with the 7" machine was a good idea. Trying to get the slope to not be ludicrously wavy with a 4" would be damned near impossible.

Too late now, but my experience with a 4" wet granite machine is that cutting wet (with a flood of water, not simply a mist) is about 2x-4x faster than cutting dry. The secret is having enough water to wash away the grit before the wheel slips on it, and having the water injected through the center of the disc. Any less water than that, and it's terribly slow going, but with a real rush of water forced out from the middle, diamonds cut at a crazy rate.

 

[SALIV8]

Thanks man. I was worried about the shock with just a mist but did think about it. The static shock I got was decent but I was ready.

I would have preferred going wet but price point with this setup seemed good.

 

[rlitman]

Looks like you've got it all figured out. My stone grinder is pneumatic, and I personally wouldn't be comfortable using wet electric tools (even though they do exist).

Anyway, the DD is perfect for this, and the better you do at dust collection, the faster you'll grind. Really, all dust you don't vacuum just ends up keeping the cutting diamonds busy pushing around dust and not cutting.

And I've found that while misting keeps dust down, the slurry it creates is not only miserable, but really bogs down your work.

 

[stickshift]

Since the OP has got his issue resolved, I have a related question.

I'm looking for a grinding wheel for my 4-1/2" angle grinder to grind down a concrete sidewalk lip. I noticed there are two general patterns:

Is one better than the other? Are they optimized for two different applications?

 

[SALIV8]

Good question!

I was looking for that answer as well. I believe the less segments the better for aggressive removal,, but not sure. This is what I used and it is mild to medium on the aggressive scale, in my first time completely unprofessional opinion.

I was able to remove what I wanted, whether it be the self leveling layers or concrete.