5" Super Soft Bond Reaper Cup, Diamond Cup Wheel for Concrete

The 5" Super Soft 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 super soft bond is made for hard to very hard concrete. The metal matrix wears away fast enough to keep exposing fresh diamond, so the wheel keeps cutting on dense slabs where a harder bond would glaze over and polish instead of grind. On soft or abrasive concrete it will wear quickly; choose a harder bond there.

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

• Diameter: 5" (125 mm)
• Segments: 12, 6 mm segment height
• Arbor: 5/8-11 threaded
• Max speed: 12,000 RPM
• Bond: super soft, suited to hard to very hard concrete
• Grits: 6, 16 and 30 (marked XXSB 6#, 16# and 30#)
• Weight: about 543 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.