APLUS 5-Inch Diamond Cup Grinding Wheel, Double Row Diamond Grinder Disc for Concrete, Granite, Stone, Marble etc

I bought this to replace a a thinner option I would use to shape concrete. I was facing a badly out of level concrete pad under where I needed to mount a continuous edge shower pan. After marking the contact points of the pan itself this wheel to bring those points level. The wheel spun nearly perfectly smooth(very balanced) and the higher number of contact patches made for smooth contact with the concrete to shape it. The price was quite a bit better than any of my local options. Highly recommended.

Did my whole kitchen floor with this and there is still a lot of abrasive left. Great value for the money.

Worked great at first but became unbalanced fairly quick. Used it on a 12'×14' patio concrete floor to remove old carpet glue and leftover backing that stuck to glue that seperated from carpet after old age. Got about half done before it started to become unbalanced and harder to control. Used it on a 9" DeWalt grinder at 2000 rpm with water on floor to keep dust down.

Worked well to get thinset off of plywood. Not to rough and kept the plywood in tact. Used on my Bosch grinder

It’s one of the very few 9” diamond cup wheels I could find at all, and so far so good.I mainly plan to use this to smooth and flatten rough or lumpy areas on concrete. The larger diameter should help make things flatter.I put it on a 7/9” Dewalt buffer/polisher by way of some 5/8” to 7/8” arbor nuts from another angle grinder. A snug fit on the cup wheel but it works.It comes with a very thin 22mm OD/20mm ID bushing to help it fit I don’t know what? Look close and you can see it sitting on the wheel in my photo.One minor concern was the very generic no name made in China box it came in didn’t specify what the max RPM it should be run at so I’m not sure if it would be good on my 7800rpm 7” angle grinder, but I only plan to use it on my buffer/polisher which only gets up to 3500RPM max anyway.

No joke grinder - pool plaster has not a chance.

I put it on an angle grinder to smooth out the rough spots on a concrete slab. The aggressive cut gives good feed back through the tool to find the high spots and easily take them down. I sprayed water the whole time and used a shop vac to vacuum up the water and sand to clean up. I put a box fan in the window but there was very little dust.

I think I probably got an hour's use out of this cup wheel. I was a polishing contractor for over ten years so I should have known better. You get what you pay for. If you don't care about deep scratches then this cup wheel is for you.