Class A Grooved
Drill Bits
Grooved-body drill bits with premium carbide tips and precision-ground flutes — delivering tighter tolerances and smoother hole walls for visible-hole applications. Ø4–Ø40mm, ±0.08mm.
How groove technology works
Four stages of precision engineering — from groove-guided entry to clean exit.
Groove-Guided Entry
The groove channels on the bit body reduce initial contact friction, allowing smoother entry with less pressure required from the machine.
Step 1 of 4 — Groove-Guided Entry
Built for precision
Four design advantages that make Class A the preferred choice for visible-hole and coated-glass applications.
Precision Groove Technology
The signature groove reduces friction by 30%, lowers heat generation, and provides additional coolant delivery channels to the cutting zone.
Premium Carbide Tip
Ground to ±0.08mm tolerance, producing holes with smoother walls and more accurate diameters than standard-grade bits.
Anti-Friction Treatment
Special surface treatment on the groove walls further reduces glass-to-metal friction, preventing coating damage on Low-E and coated glass.
Dual-Channel Cooling
External coolant supply plus internal groove channels create dual-path cooling, maintaining optimal temperature at the cutting interface.
Technical details
Class A Grooved drill bits represent a significant advancement in glass drilling precision. The defining engineering feature is the precision-machined groove running along the bit body, which serves three critical functions simultaneously. First, it reduces the contact area between the bit and the glass wall, lowering friction and the heat it generates. Second, it creates an additional channel for coolant delivery directly to the cutting zone, where thermal management is most critical. Third, it provides an escape path for fine glass particles, preventing the buildup that causes bit binding and glass cracking. Combined with a premium carbide tip ground to tighter tolerances than Class B, Class A bits produce holes with visibly smoother walls and more accurate diameters — essential for applications where the hole is visible or precision hardware fit is required.
How Class A compares
Class A Grooved excels at versatility and finish quality — the metrics that matter in precision visible-hole applications.
| Tool Type | Removal Rate | Finish Quality | Tool Life | Versatility |
|---|---|---|---|---|
| Class B | High | Standard | 500–800 holes | Good |
| Class AClass A | Good | Good | 400–700 holes | Excellent |
| Class AA | Lower | Excellent | 300–600 holes | Good |
| Countersink | Medium | Good | 400–700 holes | Medium |
Where Class A shines
Optimized for precision applications where hole quality is visible and coated-glass compatibility is required.
Architectural Hardware Mounting
Drilling precise holes for spider fittings, patch fittings, standoffs, and structural glass connectors. Hole quality directly affects the fit and appearance of exposed hardware.
Recommended Setup
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
Furniture & Display Glass
Decorative and functional holes in glass tabletops, shelving, cabinet doors, and retail display cases. Often requires countersunk holes for flush-mount fasteners.
Recommended Setup
Choose your grade
Two quality tiers available for Class A Grooved — pick the right balance of tool life and precision 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 grooves performing
Simple maintenance habits that preserve groove integrity and maintain drilling precision.
Common questions
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Tell us about your drilling requirements and our engineering team will recommend the right Class A Grooved setup.
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Precision Grooves, Perfect Holes
Get a tailored recommendation for your Class A Grooved setup — including diameter, quality tier, and compatible machine guidance.