Concrete Grinding - Is this feasible with an angle grinder ...
A 5" angle grinder is going to do fuck all of fuck all, and you'll burn it out. A 9" might suffice (we used those for smoothing floors for glue down vinyls), but if you're looking to level out a floor it's going to take some time grinding, and that means you should really just look at a 10"+ upright, or bigger still.