PCD 3 redondo con barra de desgaste - Izquierda

- Less-aggressive PCD coating-removal tool for thinner coatings — Lavina-platform PCD tool with three half-round polycrystalline diamond segments paired with a sacrificial wear bar (also called a trailing diamond strip). The wear bar fundamentally changes the PCD's behavior: it stabilizes the segment, acts as a depth guide, and prevents the PCDs from biting too deeply into the concrete underneath. Best for thinner coatings, mastics, glues, paints, and failing epoxy coatings up to 30 mils thick.

- 3-round-segment configuration with sacrificial bar — the three half-round PCDs are arranged around the tool's face with a trailing wear bar behind them. As the tool spins, the PCDs scrape the coating, then the wear bar lightly dresses the resulting surface, reducing the aggressive gouging that bare PCDs would leave. The result: a meaningfully smoother profile on the concrete underneath, with significantly less follow-up grinding required compared to PCDs without a wear bar.

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

- The right tool when "protect the slab" matters more than "remove fast" — for thick coatings, urethane, or coatings with silica-sand broadcast mixed in, PCDs without a wear bar are the faster choice — but they leave deep gouges. For surface prep where the underlying concrete will be re-coated (or stained, or polished) and contractors don't want to grind through extra steps to clean up scratches, the wear-bar version saves time downstream by leaving a cleaner profile in the first place.

- Standard Lavina QC mounting, 30-mil coating ceiling, follow-up grinding still required — fits Lavina, Onfloor, Edco Magnatrap, and other Lavina-pattern grinders directly. Coating thickness limit: 30 mils (above that, the wear bar can't keep up with the cut and the tool loads up). Recommended RPM: 550–650 for electric grinders. Even with the wear bar, plan a follow-up metal-bond grinding pass (typically 25 or 30 grit) before coating, staining, or polishing — the wear bar reduces gouging, not eliminates it. Best paired with shrouded grinders + HEPA vacuums for OSHA silica compliance (29 CFR 1926.1153).