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Model No.: HNKM60422
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Brazed Diamond Core Drill Bit – Engineered for Stone, Brick & Concrete Drilling
Our brazed diamond core drill bits are designed for fast, efficient drilling in hard, abrasive materials. Whether you are drilling through granite countertops, concrete walls, brick masonry, or paving stones, these bits deliver exceptional performance and long service life.
Why Choose Brazed Diamond Technology?
Unlike electroplated core bits that hold diamonds only in a thin surface layer, our brazed diamond bits feature a chemical metallurgical bond between the diamond grit and the steel core. This means:
No diamond loss – Diamonds stay firmly attached even under heavy drilling pressure
Longer life – One brazed bit outlasts multiple electroplated bits
Consistent performance – From the first hole to the last, cutting speed remains stable
Key Features
| Feature | Benefit |
|---|---|
| Brazed diamond bond | Diamonds will not pull out – extended tool life |
| Aggressive grit (20/25 or 30/40 available) | Fast penetration in hard materials |
| Thin kerf design | Less material to remove – lower drilling effort |
| Suitable for dry or wet use | Flexible for any job site condition |
| Standard shank sizes | Fits most angle grinders, core drills, and magnetic drills |
Typical Applications
Natural stone – Granite, marble, sandstone, limestone, slate
Engineered stone – Quartz countertops, solid surface materials
Concrete – Reinforced and non-reinforced concrete
Brick & block – Red brick, concrete block, aerated autoclaved concrete (AAC)
Paving & masonry – Pavers, tiles, porcelain, ceramic
Performance Comparison
| Feature | Brazed Diamond Core Bit | Electroplated Core Bit | Carbide Hole Saw |
|---|---|---|---|
| Diamond retention | Excellent – brazed bond | Poor – thin nickel layer | N/A |
| Service life | Very long | Short | Very short in stone |
| Drilling speed | Fast | Moderate | Slow in hard materials |
| Suitable for concrete | Yes | Limited | No |
| Suitable for granite | Yes | No (diamonds pull out) | No |
| Cost per hole | Low | High | Very high |
Drilling Guidelines
For best results, follow these simple recommendations:
| Parameter | Recommendation |
|---|---|
| Speed | 2,000 – 5,000 RPM (slower for larger diameters) |
| Pressure | Moderate – let the diamonds do the work |
| Cooling | Dry drilling with intermittent withdrawal, or use water for longer life |
| Technique | Start at an angle, then straighten to full contact |
| Depth | Withdraw frequently to clear dust/debris |
Available Sizes
We offer brazed diamond core bits in a wide range of diameters:
Small: 6mm – 20mm (for tile, glass, small stone holes)
Medium: 22mm – 50mm (for plumbing, electrical, anchor holes)
Large: 52mm – 150mm (for large pipe, duct, or dowel holes)
Custom diameters available upon request.
Specifications at a Glance
| Parameter | Value |
|---|---|
| Abrasive type | Synthetic diamond |
| Bond type | Brazed (chemical metallurgical bond) |
| Grit size | 20/25#, 30/40#, or 40/50# (customizable) |
| Shank type | 1/2" gas pipe thread, 5/8"-11, or straight shank |
| Drilling method | Dry or wet |
| Compatible materials | Stone, concrete, brick, block, tile, porcelain |
Why Buy From Us?
Quality brazing – Consistent diamond coverage, no weak spots
Competitive pricing – Direct from manufacturer
Fast shipping – Standard sizes in stock
Custom options – Any diameter, any shank type
Upgrade your drilling today – Stop struggling with slow, short-lived core bits. One brazed diamond core bit delivers consistent, fast drilling from the first hole to the last.
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