4mm - 32mm Heavy Duty Drill Bit HRC45 - HRC65 Spiral Flute Drill Bit

3 points carbide heavy duty drill manufactures for hard steel

Introduction:

Engineered for extreme durability in drilling hardened steels (HRC 45-65), these high-performance carbide drills feature a robust 2-flute design optimized for high feed rates, superior chip control, and extended tool life in demanding industrial applications.

Features:

Solid Micro-Grain Carbide – Ultra-hard substrate for wear resistance in abrasive materials

2-Flute Geometry – Balanced chip evacuation and rigidity for deep-hole drilling

Advanced Coating – TiAlN/AlCrN for heat resistance (up to 1,000°C)

Split-Point Design – Reduces thrust force and prevents walking

Performance Advantages:

3× longer tool life vs. standard carbide drills in D2, H13, 4340 steels

Higher feed rates (up to 0.25mm/rev) without compromising hole quality

Exceptional hole straightness (±0.05mm per 100mm depth)

Typical Applications:

• Die & Mold – Hardened tool steel drilling (P20, S7)

• Aerospace – Landing gear components, turbine shafts

• Oil & Gas – Drill collars, valve bodies

• Automotive – Transmission gears, crankshafts

Detailed Pictures:

Our workshop:

Promotion policy:

Free sample: Free samples can be provided, if client is willing to pay the shipping cost.

Special offer for new customers: Enjoy USD50 discount when you spend USD500+ on your first order.

CHANGZHOU AMG PRECISION TOOL MANUFACTURING CO., LTD. is a leading manufacturer and solution provider specializing in high-performance carbide cutting tools for precision CNC machining applications. With a strong commitment to innovation and quality, we design and produce an extensive range of standard and custom cutting tools, including carbide drill bits, end mills, reamers, and complex non-standard forming tools tailored to meet the most demanding machining challenges.