Laser Welded Dry Diamond Core Bit for Granite
Designed for drilling clean installation holes in granite and natural stone, the Laser-Welded Dry Diamond Core Bit combines laser-welded cutting segments with vacuum-brazed diamond protection strips on the steel barrel.
The brazed side protection helps reduce direct barrel contact with the stone and protects the steel core during drilling. Standard diameters range from 20 mm to 102 mm.
- Laser-welded diamond cutting segments
- Vacuum-brazed diamond side protection
- Designed for dry drilling
- Standard diameters from 20 mm to 102 mm
- Steel core thickness matched to the diameter
- Multiple thread and shank options
- OEM marking and packaging available
Description
Thread options: M16, M22, 1-1/4″ UNC
| Outside Diameter (mm) | Effective Length (mm) | Barrel Wall Thickness (mm) | Segment Size (mm) | Segment Quantity |
|---|---|---|---|---|
| 20 | — | 1.5 | 12 × 3.0 × 10 | — |
| 25 | — | 1.5 | 12 × 3.0 × 10 | — |
| 28 | — | 1.5 | 12 × 3.0 × 10 | — |
| 32 | — | 2 | 16 × 3.5 × 10 | — |
| 35 | — | 2 | 16 × 3.5 × 10 | — |
| 38 | — | 2 | 16 × 3.5 × 10 | — |
| 45 | — | 2 | 16 × 3.5 × 10 | — |
| 51 | — | 2 | 24 × 3.5 × 10 | — |
| 60 | — | 2 | 24 × 3.5 × 10 | — |
| 65 | — | 2 | 24 × 3.5 × 10 | — |
| 76 | — | 2 | 24 × 3.5 × 10 | — |
| 102 | — | 2 | 24 × 3.5 × 10 | — |
Applications
Recommended for drilling:
- Granite countertops
- Granite slabs
- Natural stone worktops
- Faucet and tap holes
- Plumbing installation holes
- Countertop accessory openings
- Stone fabrication and installation projects
Compatible with suitable angle grinders, handheld drilling machines and drill presses according to the selected connection.
OEM
Customization is available for:
- Outside diameter
- Core bit length
- Thread or shank connection
- Segment size and diamond bond
- Brazed side-protection pattern
- Product color and laser marking
- Private-label packaging
Provide the granite type, required hole diameter, machine model and operating speed when requesting a customized specification.
Get a Quote
Unit price depends on the diameter, connection, segment specification, side-protection design, order quantity and packaging.
Send the following information for a quotation:
- Required diameter and quantity
- Core bit length
- Connection type
- Material to be drilled
- Machine model and operating speed
- OEM marking or packaging requirements
Wholesale pricing, MOQ, sample cost and production lead time will be confirmed according to the requested specification.
