Diamond Cup Wheels

Reaper Cup segmented diamond cup wheels for grinding concrete with an angle grinder. Each wheel mounts on a 5/8-11 threaded arbor: the 5 inch (125 mm) wheel has 12 segments and is rated to 12,000 RPM, and the 7 inch (180 mm) wheel has 22 segments and is rated to 8,000 RPM. Match the bond to the concrete, since a softer bond suits harder concrete: super soft bond for hard to very hard concrete, medium bond for medium hardness concrete, and hard bond for soft or green concrete and abrasive overlays. Then pick the grit: 6 grit for aggressive coating and mastic removal, 16 grit for levelling and heavy stock removal, and 30 grit for profiling before a coating. Never exceed the rated speed, wear eye, ear and respiratory protection, and connect a dust extractor to the grinder shroud.