AlTiSiN Coated Deep Hole Drill Bits 20D Carbide Drill Bits For Steel

20D Carbide deep hole drill with AlTiSiN coating for steel

Introduction:

Precision-engineered for extreme-depth drilling (20× diameter) in carbon steel, alloy steel, and stainless steel. Combining ultra-fine grain carbide with advanced coolant-through technology, these drills deliver unmatched stability, efficient chip evacuation, and exceptional tool life in demanding industrial applications.

Features:

1.20D Depth Ratio – Reliable performance for deep-hole drilling (up to 20× diameter)

2.Optimized Geometry – Parabolic flutes + split-point design for reduced thrust force and chip clogging

3.High-Pressure Coolant Channels – Internal coolant holes (dual/triple) for effective heat and chip removal

4.Wear-Resistant Coating – AlTiSiN/AlCrN coatings for enhanced heat resistance (up to 900°C)

5.Rigid Shank Design – Precision-ground tolerance (h6) for minimal runout

Performance Advantages:

30% longer tool life vs. conventional carbide drills

Superior hole straightness (±0.1mm/100mm)

Reduced cycle time with aggressive feeds (up to 0.3mm/rev)

Typical Applications:

• Oil & gas (valve bodies, drilling components)

• Automotive (transmission shafts, hydraulic cylinders)

• Mold making (ejection pin holes, coolant channels)

• Energy (turbine blades, boiler tubes)

Detailed Pictures:

Our workshop:

Promotion policy: 

Free sample:  If clients can pay shipping fee, could get free samples (under USD20) for testing.

Special offer for new customers: New clients can enjoy USD50 discount coupon for first order, if the total order amount is more than USD500.