7" Medium Bond Reaper Cup, Diamond Cup Wheel for Concrete

The 7" Medium Bond Reaper Cup is a segmented diamond cup wheel for concrete grinding on an angle grinder. Use it to strip coatings, mastic and adhesive, take down high spots and open the surface for a new floor coating. Available in 6, 16 and 30 grit.

A medium bond is the all-round choice for medium-hardness concrete, balancing cutting speed against wheel life. If the wheel glazes and stops cutting on a dense slab, step to a softer bond; if it wears quickly on soft or sandy concrete, step to a harder one.

Run it on a grinder with a 5/8-11 spindle, under a dust shroud connected to an industrial dust extractor.

• Diameter: 7" (180 mm)
• Segments: 22, 6 mm segment height
• Arbor: 5/8-11 threaded
• Max speed: 8,000 RPM
• Bond: medium, suited to medium-hardness concrete
• Grits: 6, 16 and 30 (marked MB 6#, 16# and 30#)
• Weight: about 1,057 g

Choosing a grit

• 6 grit: the most aggressive cut, for coating, mastic and adhesive removal.
• 16 grit: general grinding and profiling, or cleaning up after a 6 grit pass.
• 30 grit: a finer scratch for smoothing the surface before coating.