Product Overview

Our M35 Cobalt High Speed Steel (HSS) twist drill bits are premium industrial-grade cutting tools, specially engineered for high-efficiency, high-precision drilling in hard metal materials. Made from M35 high-speed steel with 5% cobalt addition, these drill bits deliver exceptional red hardness, wear resistance, and impact resistance, making them the ideal solution for drilling stainless steel, alloy steel, and other medium-high hardness metals.

Compared with ordinary M2 HSS drill bits, our M35 cobalt twist drills have a 2x longer service life and can withstand higher cutting temperatures, making them perfect for metal fabrication, mechanical processing, construction, and maintenance operations worldwide.

Key Product Features

✅ Premium M35 Cobalt HSS Base Material

Made from industrial-grade M35 high-speed steel with 5% cobalt addition, after vacuum quenching and tempering treatment, the hardness reaches HRC 66-68. It has excellent red hardness, maintaining sharp cutting edges even at high cutting temperatures, and outstanding impact resistance, no easy chipping or breaking during heavy-duty drilling.

✅ Optimized Twist Flute Design

The 118° standard split point design and optimized helical flute structure ensure fast, smooth chip evacuation, reduce cutting resistance and heat buildup, and improve drilling efficiency. The sharp cutting edges deliver clean, burr-free holes with high precision, meeting the strict requirements of industrial processing.

✅ Multiple Coating Options Available

We offer optional PVD metal coating (TiN/TiAlN/Blue Nano Coating) to further improve wear resistance, reduce friction, and extend service life by 3-5 times, suitable for different processing scenarios and material requirements.

✅ Wide Compatibility

Suitable for all standard drilling equipment, including bench drills, magnetic drills, hand drills, and CNC machining centers, compatible with various metal materials such as stainless steel, carbon steel, alloy steel, cast iron, and non-ferrous metals.

✅ Complete Size Range

Available in a full range of sizes from 1mm to 20mm, supporting custom non-standard sizes and bulk packaging to meet the diverse needs of industrial production and maintenance.

Full Product Specifications

Performance Comparison: M35 Cobalt HSS Drill vs Ordinary M2 HSS Drill

Wide Application Scenarios

Our M35 cobalt HSS twist drill bits are widely used in global industrial fields, including:

🏭 Metal Fabrication & Mechanical Processing: Precision drilling for mechanical parts, molds, and hardware products.

🏗️ Construction & Steel Structure: Drilling for steel plates, profiles, and bolt connections.

🔧 Industrial Equipment Maintenance & Repair: On-site drilling and repair for power plants, petrochemical facilities, and manufacturing plants.

🚗 Automotive & Heavy Truck Manufacturing: Drilling for auto parts, chassis, and engine components.

🔩 HVAC, Plumbing & Electrical Installation: Drilling for pipe supports, electrical enclosures, and hardware installation.

B2B Wholesale & OEM Services

As a professional manufacturer, we offer flexible B2B cooperation solutions for global buyers:

✅ Bulk Wholesale: Competitive factory prices for large-volume orders, stable supply, and fast global shipping.

✅ OEM/ODM Customization: Custom sizes, coatings, packaging, and brand logo laser engraving to meet your specific business needs.

✅ Private Label Support: Custom packaging and private labeling to build your own brand.

✅ After-Sales Support: 12-month warranty for non-human damage, 7×24-hour technical support, and full spare parts supply.

Usage Tips & Maintenance

1. Use Cutting Fluid: Reduce cutting temperature, lubricate cutting edges, and extend tool life, especially for stainless steel and hard alloys.
2. Match Speed & Feed to Material: Use lower RPM and steady feed for hard materials to avoid drill breakage.
3. Secure Clamping: Ensure the drill bit is firmly clamped in the equipment to eliminate vibration.
4. Clean & Inspect After Use: Remove chips from flutes, inspect cutting edges for damage, and store in a dry place.
5. Professional Resharpening: Restore drill performance and extend service life with professional resharpening when edges dull.