Lavina Grey QC Metal Bond
Lavina Grey QC metal bond diamonds are formulated for grinding medium-hard concrete between 2,500 and 4,000 PSI.
Available in:
- Button and Rectangular configurations
- Single and Double Segment Options
- Grit Sizes from 14 to 120
Lavina Grey QC Metal Bond Designed for Medium-Hard Concrete
Concrete hardness affects how quickly diamond tooling cuts, how long the bond lasts, and the scratch pattern left on the surface. For concrete between 2,500 and 4,000 PSI, the Lavina Grey QC Metal Bond Series is designed to provide the bond hardness needed for medium concrete conditions.
Selecting the right segment configuration and grit helps balance cutting speed, tooling wear, and surface preparation requirements.
Segment Configurations and Grits
Lavina Grey QC metal bond diamonds are available in four configurations:
- One Button
- Two Button
- One Rectangular Segment
- Two Rectangular Segments
Each configuration is available in 14, 30, 50, 70, and 120 grit.
Choosing the Right Configuration
- Single-segment tools: Recommended for lighter machines under 30 inches. They provide a more aggressive cut and are also recommended for the first grinding step on larger machines when faster surface opening is desired.
- Double-segment tools: Recommended for heavier machines 30 inches and larger. Additional segments provide greater surface contact and help refine the scratch pattern.
Fewer segments generally cut faster but wear more quickly. Tool life varies with concrete hardness and surface conditions.
Coating Removal
Segment shape also matters when removing existing coatings:
- Round button tools: Recommended for cementitious coating removal.
- Rectangular bar tools: Recommended for non-cementitious coating removal.
Grinding Recommendations
For best results, match the tooling configuration to the grinder size, concrete conditions, and grinding stage. Run metal bond tooling at low RPM.
Use Lavina QC tooling with Lavina Security Plates for safe operation.
Not sure which bond is right for the floor? A Mohs Hardness Scratch Test Kit can help identify concrete hardness before selecting tooling.
Lavina Bond Selection Reference
| Lavina Series | Concrete Hardness | Mohs Scale |
|---|---|---|
| Yellow | Soft, under 2,500 PSI | 2–3 |
| Grey | Medium, 2,500–4,000 PSI | 3–5 |
| Red | Hard, 4,000–5,500 PSI | 5–6 |
| Gold | Extra Hard, 5,500–7,000 PSI | 7 |
| White / Black Cap Cutters | Super Hard, 7,000–9,000 PSI | 8–9 |
Use a Mohs Hardness Scratch Test Kit to help determine concrete hardness before selecting a metal bond. PSI ranges are general guidelines and actual floor conditions can vary.
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