How To Sand Concrete With Angle Grinder. The grinder is fitted with sanding papers ranging from 60 grit, which is used to even out concrete floor corners and countertops, to 120 grit, which is used to smooth the concrete into a polished finish. Once the surface area is sufficiently clean, you should run an extension lead for your wet/dry vacuum and angle grinder if it's not a cordless grinder.
Not only this, but it can be used in a variety of materials, from wood and masonry to concrete, tiles, bricks, asphalt and metal. What makes the grinder so versatile is the variety of discs and accessories that can be used with it. Slowly work your way along the cutline.
As such, the angle grinder is a very versatile tool.
These units need to be static, meaning that you have to put the on a workbench or. Selecting the correct angle grinder for concrete grinding purposes is very important. It can be used to cut, grind, peel or finish surfaces. Allow the grinder time to cut into the concrete.