Advanced Engineering for Precision Metalworking
1. CNC Precision Grinding
Our M35 cobalt HSS center drill bits are manufactured with high-accuracy CNC grinding to ensure precise tip alignment, uniform step geometry, and razor-sharp edges. This precision guarantees clean, chatter-free drilling and reliable centering in demanding metalworking conditions, especially during high-RPM lathe operations.
2. Vacuum Heat Treatment
Each drill bit undergoes a vacuum heat treatment process, enhancing both surface hardness and core toughness. This makes them especially suitable for hard-to-machine materials like stainless steel and alloy steels, while ensuring prolonged tool life in continuous or high-speed cutting applications.
3. Ultra-Fine Polishing
A mirror-polished surface finish reduces friction and heat buildup, allowing for cleaner chip evacuation and better drilling stability. This feature also prevents surface damage when working with softer materials such as aluminum, copper, or thermoplastics.
Refined Metallurgy & Thermal Optimization
1. Advanced Steel Purification: EAF + LF + VD + ESR
Using premium-grade M35 high-speed steel, our drills are refined through Electric Arc Furnace (EAF), Ladle Refining (LF), Vacuum Degassing (VD), and Electro-Slag Remelting (ESR). This process removes impurities, resulting in uniform structure, higher toughness, and greater heat resistance.
2. Thermal Optimization to HRC 67
Through integrated processes including quenching, cryogenic treatment, and precision tempering, the hardness is optimized to HRC 67, ensuring maximum edge retention while resisting brittleness or cracking during heavy-duty or high-temperature lathe operations.
3. RS ESR Edge Reinforcement
Rapid Solidification ESR technology ensures a fine dispersion of cobalt and carbides at the cutting edge, dramatically increasing wear resistance, hot hardness, and edge durability-perfect for high-load, industrial-grade cutting environments.
Customizable Solutions for Industrial Needs
1. Material Flexibility - M35 Preferred
While M2 and M42 options are available, M35 cobalt HSS offers the ideal balance of red-hardness and toughness, making it our recommended material for most precision machining and metalworking environments.
2. Tailored Geometry & Coatings
Clients can request custom step sizes, flute designs, and helix angles for optimized performance on specific machines or metals. PVD coatings (TiN, TiAlN, TiCN) are available to reduce friction and extend tool life, especially under high-speed, high-temperature conditions.
Precision Lathe Drilling: Designed for Performance
1. Multi-Step Flute Optimization
Our flutes are engineered for efficient chip removal and thermal management, reducing clogging and improving cutting stability. Especially useful for thin-walled workpieces or plastic-metal hybrid structures.
2. Optimized Tip and Transition Angles
The step transitions and tip geometry are designed to reduce axial load, ensure dimensional stability, and prevent material deformation, even when drilling curved, sloped, or thin sections.
3. Industrial-Grade Coating Options
Choose from TiAlN for extreme temperature resistance or TiCN for superior wear protection-ensuring your M35 center drills remain sharp and accurate throughout long production cycles.
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