High-Precision Carbide Gun Drill Tips for Deep Hole Drilling

Drillstar carbide gundrill blanks and inserts, as sintered and ground

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Product Description

Overview

The High-Precision Carbide Gun Drill Tips are specialized cutting tools engineered to meet the extreme demands of deep hole drilling, where precision and reliability are paramount. Crafted from ultra-hard tungsten carbide (92-93 HRA) with optimized geometries, these tips enable consistent hole quality in depths up to 3 meters and diameters from 3mm to 50mm, even in tough materials like stainless steel and titanium.

Features

Extreme Hardness & Wear Resistance:

Fine-grain carbide (1.5μm) with cobalt binder (6-8%) provides superior resistance to abrasion, maintaining cutting edge integrity during long-depth drilling in abrasive composites.

TiCN coating (3-5μm thickness) enhances resistance to adhesive wear, reducing built-up edge (BUE) in sticky materials like aluminum alloys.

Optimized Hydraulic Design:

120° split point angle ensures self-centering and reduces thrust force by 20%, critical for starting holes in off-center or curved surfaces.

Asymmetrical flute design with variable cross-section improves chip evacuation under high-pressure coolant (150-300 bar), preventing tool clogging in deep bores.

Precision Engineering:

Laser-ground lands and margins maintain hole straightness within 0.1mm/m, meeting ISO 286-2 geometric tolerances for hydraulic cylinder bores.

Electrolytic edge rounding (0.02-0.05mm) reduces micro-chipping, extending tool life by 30% compared to uncoated tips.

Application

Critical for industries requiring deep hole accuracy:

Oil & Gas: Drilling high-pressure lines in subsea valves and pipeline components, compliant with NACE MR0175 corrosion standards for sour gas environments.

Firearms: Machining rifle barrels with consistent bore diameters and twist rates, adhering to SAAMI specifications for ballistic performance.

Hydraulics: Creating deep, straight holes in servo valve blocks and actuator cylinders, ensuring leak-free operation at 3,000 PSI operating pressure.

Aerospace Engine Components: Drilling cooling channels in turbine blades and combustion chambers, supporting heat dissipation in high-temperature engine environments.

Why Choose Us

Material-Specific Design: Customizable tip angles and coatings for soft metals (aluminum), hard steels (65 HRC), and composite materials (CFRP), reducing trial costs by 60%.

Rigorous Testing: Every tip undergoes ultrasonic flaw detection and dimensional verification, with traceability records available for 10 years.

Technical Partnership: On-site application engineers optimize drilling parameters (speed, feed, coolant pressure) to achieve maximum productivity for your specific machine setup.

Fast Turnaround: Standard tips shipped within 24 hours; custom geometries (e.g., stepped tips for multi-diameter holes) delivered in 10 business days.

gun drill blanks			gun drill tips
Dimension D*L	grade		Dimension D*L	grade
Dimension D*L	AF6	AS10	Dimension D*L	AF6	AS10
2.4*330mm
3.5*330mm	x
4.5*330mm	x
5.5*330mm	x
6.5*330mm	x
7.0*330mm	x		7.0*35mm
7.5*330mm	x		7.5*35mm
8.0**330mm	x		8.0*35mm
8.5**330mm	x		8.5*35mm
9.0**330mm	x		9.0*35mm
9.5**330mm	x		9.5*35mm
10.0**330mm			10.0*35mm
10.5**330mm	x		10.5*40mm
11.0**330mm			11.5*40mm
11.5**330mm	x		12.5*40mm
12.0**330mm			13.5*40mm
12.5*330mm	x		14.5*40mm
13.0*330mm			15.5*40mm
13.5*330mm	x		16.5*40mm
14.0*330mm			17.5*40mm
14.5*330mm	x		18.5*40mm
15.0*330mm			19.5*45mm
15.5*330mm	x		20.5*45mm
16.0*342mm			21.5*45mm
16.5*330mm	x		22.3*50mm	x
17.0*330mm			23.3*50mm	x
17.5*330mm	x		24.3*55mm	x
18.0*330mm			25.3*55mm	x
18.5*330mm	x		26.3*55mm	x
19.0*330mm			27.3*55mm	x
19.5*330mm	x		28.3*65mm	x
20.0*330mm			30.3*65mm	x
20.5*330mm	x		32.3*65mm	x
21.5*330mm	x		33.3*65mm	x