PCD - Piranha - Large Tooth - Right

- Most aggressive PCD coating-removal tool for the heaviest prep jobs — PCD (polycrystalline diamond) tools are the industry's most effective answer for stripping heavy coatings, epoxy overlays, paint, glue, mastic, thin-set, urethane, and carpet adhesive from concrete. Unlike standard metal-bond grinding segments that wear diamond grit against the surface, PCD scraper teeth physically peel the coating off — much faster removal with substantially less concrete damage underneath.

- "Large tooth" configuration for thick coatings and maximum removal speed — the larger PCD scraper inserts cut a wider, deeper bite per pass than small-tooth PCDs. Ideal for thick coatings (over 3mm), heavy urethane, multi-layer epoxy overlays, and severely contaminated slabs where removal speed matters more than scratch-pattern depth. For thinner coatings or finer prep work, the small-tooth Piranha removes material more gently and leaves a shallower scratch pattern that's easier to clean up afterward.

- "Right" = clockwise rotation — direction matters — PCD scraper teeth are direction-locked: the cutting edge is angled to bite during rotation in one specific direction only. Right-rotation tools are for grinders that spin clockwise (viewed from above). Critical rule for planetary / rotary grinders with counter-rotating heads: order half right and half left to balance the machine. Running all same-direction PCDs on a counter-rotating machine causes severe walking, unbalanced cut, and accelerated tool wear.

- Polycrystalline diamond on tungsten carbide substrate — PCD teeth are made of synthetic diamond particles sintered together under high pressure and high temperature, then bonded to a tungsten carbide substrate that provides the structural strength. Many Piranha designs include a protective diamond strip behind the PCD teeth that lightly dresses the scratches and supports machine weight — extending tool life by allowing the PCD bite to stay shallow rather than digging in.

- Plan for follow-up grinding to clean up the scratch pattern — large-tooth PCDs cut so aggressively that they leave deep gouges in the concrete underneath the coating. Always plan a follow-up metal-bond grinding pass (typically starting at 16 or 25 grit) to remove the PCD scratch pattern before progressing through the standard prep or polishing sequence. Skipping this step leaves the floor unsuitable for coating, staining, or polishing. Best paired with shrouded grinders + HEPA vacuums; PCD work generates large volumes of coating debris and concrete dust at high speed, making OSHA silica compliance (29 CFR 1926.1153) non-optional for indoor jobs.