It should work just fine. Be sure to wear eye and hand protection for safety.
It's a tricky thing that you are doing. If the surface has a think or sticky coating, it will certainly hinder the cutting tool. There are two ways to deal with this that are basically two versions of the same solution ... use solvent to clean the tool repeatedly so that the cutting edges are always clear or clean the floor before you start so the gooey materials are minimized. The first method might be easier, but there's just no way around it.
Great for grinding down leftover mortar from the subfloor after tile removal! Pair this with the kit to lookup to your shop vac for a dustless removal!!
Not sure, I have 4.5” for that reason.
Plaster and paint will find a way to infiltrate the pores of the concrete blocks and no amount of grinding will get it out. Your best course of action here is to use a chemical peal in combination with heat to remove the surface material. A sanding wheel can then be used to smooth the surface in preparation for new coatings.
I am able to use this wheel without the flange nut, my grinder turns in the direction that tightens the wheel to the arbor.
Probably 2 or 3 days. It's not just the grinding, it's the dust control and clean up. If you use this on concrete you will create a lot of dust. Make certain you wear goggles and respiratory protection. I blew the dust out the back door with a fan, covered everything, and it took me a while to clean up the dust that got under the plastic sheeting. I took about 3 hours to grind down a 3 x 6 area of mastic to prep for tile laying.
It's for grinding concrete; should work fine on concrete countertop.
I would not recommend it with this tool.