30S Grit Triangle Double Segment Blue for Hard Concrete

- Aggressive metal-bond diamond segment for early grinding steps — the 30-grit cutting surface opens up the concrete, removes coatings, exposes aggregate, and creates the profile needed for subsequent grinding and polishing. The triangle segment shape delivers an aggressive entry into the cut and is commonly used to expose medium-to-large aggregate quickly. Fits any walk-behind grinder using the Lavina-style mounting pattern (three 9mm holes).

- Triangle double-segment configuration — the triangular geometry creates a leading edge that bites aggressively into the slab, while the double-segment layout (two triangles per shoe) doubles surface contact for better tool life and a more uniform scratch pattern. Best paired with larger / heavier walk-behind grinders (25" and up) where the extra contact patch helps the machine pull weight.

- Engineered specifically for hard concrete — hard concrete (typically 5,000+ PSI, Mohs 7+) doesn't wear diamonds down enough to keep them sharp, causing the segment to "glaze" and slide across the surface without cutting. The soft metal bond (the "S" in 30S) wears away faster on purpose, continuously exposing fresh diamond and keeping the cut aggressive.

- Counterintuitive but correct: soft bond on hard concrete, hard bond on soft concrete — using the wrong bond on a hard slab causes glazing, where the diamonds polish smooth and stop cutting entirely. If you see glazing on the job, switching to this softer bond (or reducing machine weight, slowing RPM, or adding water mist) reopens the diamonds and restores the cut.

- Color-coded by manufacturer for quick identification — the blue designation is Simiron's color code for the hard-concrete bond. Most contractors keep three-color sets on the truck (one bond per concrete hardness category) so the right segment can be selected on-site once the slab is tested. After the 30-grit cut, the typical sequence steps up through 50, 80, and 100-grit metals, then into transitional and resin polishing pads.