Class B Bronze
Drill Bits
Bronze-bodied drill bits with industrial-grade carbide tips — the reliable, cost-effective workhorse for general-purpose glass drilling. Ø4–Ø50mm, resharpenable 2–3 times, built for volume.
How it works
Four stages of precision engineering — from initial contact to finished hole.
Center Contact
The carbide tip makes initial contact with the glass surface. The tip geometry creates a compression zone that initiates controlled fracture rather than impact cracking.
Penetration
As rotation continues, the carbide tip advances through the glass. The bronze body absorbs vibration and dissipates heat generated at the cutting interface.
Swarf Evacuation
The flute channels carved into the bronze body create paths for glass particles to escape upward, preventing buildup that could cause bit binding or glass cracking.
Exit & Finish
The tip breaks through the exit surface. The compression cutting action minimizes exit-side chipping, producing a clean hole ready for hardware installation.
Center Contact
The carbide tip makes initial contact with the glass surface. The tip geometry c...
Penetration
As rotation continues, the carbide tip advances through the glass. The bronze bo...
Swarf Evacuation
The flute channels carved into the bronze body create paths for glass particles ...
Exit & Finish
The tip breaks through the exit surface. The compression cutting action minimize...
Built for volume
Four design advantages that make Class B the go-to choice for production environments.
Bronze Heat Sink Body
The bronze alloy body conducts heat away from the carbide tip, maintaining cutting efficiency during continuous high-volume operations.
Optimized Flute Geometry
Precision-machined flutes channel glass swarf away from the cutting zone, preventing clogging and reducing the risk of thermal damage to the glass.
Resharpenable Design
Class B bits can be resharpened 2–3 times using a diamond grinding wheel, extending their useful life and reducing cost-per-hole.
Wide Glass Compatibility
From 3mm thin glass to 25mm thick architectural panels, Class B bits handle the full range of standard glass types and thicknesses.
Technical details
Class B Bronze drill bits are the most widely used drilling tools in the glass processing industry. The bronze alloy body serves as more than just structural support — it acts as a thermal management system, drawing heat away from the carbide cutting tip during continuous drilling. This thermal conductivity prevents the tip from reaching temperatures that would cause it to lose its edge, significantly extending the useful life of each bit. The flute geometry is optimized for glass swarf evacuation, channeling fine glass particles away from the cutting zone to prevent clogging and re-cutting. Class B bits are the cost-effective choice for operations where reliability and cost-per-hole matter more than ultimate precision.
How Class B compares
Class B Bronze excels at removal rate and cost-efficiency — the metrics that matter most in high-volume production.
| Tool Type | Removal Rate | Finish Quality | Tool Life | Cost Efficiency |
|---|---|---|---|---|
| Class BClass B | High | Standard | 500–800 holes | Excellent |
| Class A | Medium | Good | 400–700 holes | Good |
| Class AA | Lower | Excellent | 300–600 holes | Fair |
| Countersink | Medium | Good | 400–700 holes | Good |
Where Class B shines
Optimized for high-volume, cost-sensitive applications where reliability matters more than ultra-precision.
Shower Enclosure Assembly
Holes for hinges, handles, towel bars, and magnetic strips in tempered glass panels. Requires clean, chip-free holes that maintain the integrity of the tempered surface.
Recommended Setup
Photovoltaic Panel Processing
Mounting holes in solar panel glass for frame assembly and electrical conduit passage. High-volume drilling with consistent quality across thousands of panels.
Recommended Setup
Choose your grade
Two quality tiers available for Class B Bronze — pick the right balance of tool life and cost for your operation.
Standard
Reliable daily performance
Features
- Industrial-grade tungsten carbide tip
- Steel or bronze body construction
- Consistent daily performance
- Standard warranty coverage
- Wide machine compatibility
Premium
Extended life, tighter tolerance
Features
- Fine-grain tungsten carbide tip
- Precision-ground geometry
- 30–50% longer life than Standard
- Tighter hole diameter tolerance
- Smoother hole wall finish
Keep your bits sharp
Simple maintenance habits that extend tool life and maintain drilling quality.
Common questions
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