Description
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The 7 inch 20 grit cupwheel is a high-performance diamond tool designed for aggressive grinding, coating removal, and surface prep on concrete. Featuring a 3-piece S-segment configuration (also known as “Cobra Style”), this cupwheel delivers extremely aggressive performance — making it a top choice for contractors working in high-production environments.
Each segment is embedded with large, premium diamond chunks that aggressively scratch into the surface, leaving a better bonding profile than traditional 30/40 grit cupwheels. This helps coatings adhere more effectively after grinding and reduces the need for multiple passes.
With a medium bond, this cup is ideal for general-purpose grinding on standard concrete. Professionals choose this 7 inch 20 grit cupwheel for fast grinding across tough coatings. It’s perfect for jobs that require:
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Rapid mastic or thinset removal
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Removing epoxy, glue, or coatings
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Preparing surfaces for overlays or stains
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Aggressive profiling of cured concrete
The flat design and segment layout help avoid horseshoe marks, even when used without a shroud. Our 7 inch 20 grit cupwheel works great with dust shrouds and 7” grinders. It mounts to most 7” angle grinders and is fully compatible with our Dust Avenger 007 Kit, making it a smart add-on for any professional grinding setup.
Whether you’re prepping a slab, stripping a coating, or leveling an uneven floor, the 7” 20 Grit RED S Segment Cupwheel gives you fast, reliable cutting — at a price that keeps you competitive on repeat purchases. This cupwheel is ideal for prep crews working in demanding commercial environments. Whether you’re stripping epoxy from a warehouse floor or removing glue from a school remodel, the 7 inch 20 grit cupwheel delivers consistent results. Its aggressive bite and open segment spacing reduce loading and allow for faster material removal with less heat buildup.
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Note: As a consumable item, grinding life varies by surface hardness, grinder speed, and pressure applied.