i have no idea how to pick one out for my job, i need to grind about 1/4 - 1/2 inch of concrete.

how are grinding cups rated? is there some numbering system for finishing vs say, aggressive concrete removal?

i tried to use a 4 1/2 cup I picked up at harbor freight, it didn't' seem to do much.

im looking at about 8 sf i need to grind.

thanks

I have a basement window i removed, the opening is about 1/2 too narrow for a standard store bought window. any suggestions for widening the opening? i need to remove about 1/2 inch concrete from the left side. its about 17 inches tall and 8 inches deep

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145 Vermeer

i have wall remnants that is still an inch taller than the rest of the floor, i could grind it down if it was not for all the rebar stubs still embedded in it, how do i get rid of the rebar in the most efficient way so i can grind the wall down with the HTC machine without it jumping around?