CNC Precision Grinding for Consistent Accuracy
Each HSS center drill bit is crafted using CNC precision grinding, delivering uniform step geometry, razor-sharp edges, and exact tip centering. This precision ensures clean, chatter-free drilling in metal lathe applications, with minimal vibration and maximum control-even at high spindle speeds.
Vacuum Heat Treatment for Long-Term Performance
Our drills undergo vacuum heat treatment to enhance both surface hardness and internal toughness, enabling exceptional resistance to wear, deformation, and thermal fatigue. Ideal for use on stainless steel, aluminum, and other hard metals, these bits remain sharp and stable under continuous high-load operation.
Ultra-Fine Polishing for Clean Finishes
A mirror-finished surface reduces friction and heat generation, while improving chip evacuation during deep or repetitive drilling cycles. This polished finish also prevents workpiece damage, especially when machining softer metals or thermoplastics-delivering cleaner, sharper cuts.
Refined Metallurgy & Thermal Optimization
High-Purity Steel via EAF + LF + VD + RS-ESR
Our HSS center drills are produced using a multi-stage steelmaking process including Electric Arc Furnace (EAF), Ladle Refining (LF), Vacuum Degassing (VD), and Electro-Slag Remelting (ESR) with rapid solidification. This ensures low impurity content, improved durability, and high performance in precision drilling.
Integrated Thermal Hardening Process
A combination of quenching, cryogenic treatment, and precision tempering increases hardness up to HRC 67, while maintaining ductility to resist chipping. This guarantees reliable operation under high-speed, high-pressure lathe drilling common in automotive, aerospace, and tooling industries.
RS-ESR Edge Stability Technology
Using Rapid Solidification ESR, the drill edge is reinforced with a uniform microstructure of carbides and cobalt-boosting wear resistance, thermal stability, and edge retention, especially in long-cycle or demanding machining conditions.
Customizable Engineering for Application Flexibility
Material Options: M35-Centric Design
While M2 and M42 are available, we recommend M35 HSS for its optimal hardness-to-toughness ratio, ensuring excellent wear resistance and cutting edge stability in lathe work, particularly when drilling abrasive or high-strength materials.
Custom Step Geometry and Coatings
Available with tailored flute lengths, helix angles, and step sizes, our drills can be configured for specific applications. Optional PVD coatings such as TiN, TiAlN, or TiCN enhance tool life by improving resistance to heat, wear, and friction in aggressive cutting environments.
Design Innovations for Lathe Efficiency
Optimized Multi-Step Chip Flow
The flute spacing between steps is carefully engineered to enable smooth chip evacuation, preventing clogging and minimizing heat accumulation. This supports stable, high-RPM drilling, particularly in thin sheet metals or thermoplastics.
Precision-Cut Step Angles for Smooth Entry
Cutting angles and step transitions are tuned to reduce axial force and material deformation, especially in thin-walled or soft metals. The result: stable drilling with clean entry points and crisp finishes.
Application-Specific Coating Solutions
For high-performance requirements, drills can be coated with TiAlN for high-temperature lathe work or TiCN for enhanced wear protection. These coatings extend tool life and enable reliable, multi-diameter performance in complex or automated machining lines.
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