| Customization: | Available |
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| Customized: | Customized |
| Standard: | GB/T |
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Multi-Material Versatility - Designed for superior performance on stainless steel, alloy steel, cast iron, and other hard-to-machine materials. This premium M35 cobalt alloy set is ideal for use across industrial manufacturing, maintenance, and construction tasks.
High-Precision Cutting Performance - Featuring ultra-sharp cutting edges and precision-balanced flutes, each drill bit ensures clean entry, minimal vibration, and smooth, accurate drilling-especially suitable for high-volume or critical operations.
Advanced Durability via Heat Treatment - Crafted from M35 cobalt high-speed steel, each bit undergoes specialized heat treatment to enhance surface hardness, increase wear resistance, and extend service life in high-temperature, high-pressure environments.
Flexible, Multi-Purpose Utility - Offered in multiple specifications (e.g., 1-13mm sets or custom sizes), this drill set adapts to electrical installation, fabrication, repair, workshop use, and more-reducing tool changes and streamlining workflow.
1)Stainless Steel
2)Mold Steel
3)Copper Alloy
4)Aluminum Alloy
5)Cast Iron
6)PVC
High-Performance Cutting Edge - Crafted from premium M35 cobalt-alloy high-speed steel, each bit delivers rapid penetration into stainless steel and other tough metals with minimal cutting resistance and excellent edge retention.
Precision-Ground Anti-Slip Tip - The fully ground tip design ensures accurate starting points and stable alignment, significantly reducing walking during high-speed, handheld, or punchdown drilling.
Optimized Spiral Flute Geometry - Engineered with advanced chip evacuation channels, the flute design improves debris clearance, reduces heat accumulation, and maintains cutting efficiency in continuous or deep-hole applications.
Durable, Corrosion-Resistant Surface Finish - The polished coating enhances both the professional appearance and resistance to oxidation and rust, extending the lifespan of the tool in humid or industrial settings.
Ergonomic and Balanced Construction - With lightweight design and even weight distribution, these drill bits reduce user fatigue and provide greater stability and control during extended or multi-position drilling tasks-ideal for precision work and batch operations.
Available Sizes:
| Specification | Cutting Diameter | Overall length | Blade length |
| 1 | 1mm | 34mm | 12mm |
Premium M35 Twist Drill Set - Cobalt Alloy, Multiple Specifications
1. Outstanding Wear Resistance & Heat Tolerance
Crafted from M35 cobalt high-speed steel, this drill set offers excellent red hardness and durability. It maintains sharpness and structural integrity under high-temperature, high-friction conditions, making it ideal for tough metals like stainless steel.
2. Compatible with a Wide Range of Materials
Engineered for stainless steel, hardened alloys, carbon steel, and cast iron, this set delivers stable and efficient drilling performance across industrial manufacturing, mechanical workshops, and heavy-duty environments.
3. Multi-Purpose Versatility. Ideal for metal fabrication, equipment installation, maintenance, and construction, this set meets the needs of both professional users and technical DIYers. Expect clean, accurate, and efficient results, all from a single, versatile drill bit set.
CNC Precision Grinding - Delivers consistently accurate flute geometry and tip angles, ensuring smooth, reliable performance during high-speed or repetitive drilling operations.
Vacuum Heat Treatment - Significantly improves the surface hardness and internal toughness of M35 cobalt alloy steel, extending tool life even in intensive industrial conditions.
Ultra-Fine Polishing - Reduces cutting friction and chip adhesion, promoting better heat dissipation and preserving workpiece surface integrity during high-load use.
EAF + LF + VD + RS ESR Technology - Produces ultra-clean M35 cobalt steel with improved toughness and reduced brittleness, enabling greater stability under mechanical and thermal stress.
Quenching + Cryogenic Treatment + Tempering - Optimizes the steel to a hardness level of up to HRC 67, while maintaining structural flexibility to resist cracking and deformation-crucial for consistent performance when drilling metals.
Rapid Solidification ESR - Enhances abrasive resistance by refining the distribution of carbide and cobalt particles along the cutting edge, improving wear resistance during deep or high-speed drilling.
M35-Centric Configuration - This set is built around the M35 cobalt alloy, selected for its excellent thermal resistance and durability in cutting stainless steel and high-strength alloys. Alternative materials (e.g., M2, M42) can be provided on request.
Tailored Geometry & Coatings - Options include custom flute lengths, helix angles, and advanced PVD coatings such as TiN, TiAlN, or TiCN, adapted for enhanced chip evacuation, wear resistance, or material-specific performance.
High-Efficiency Flute Design - Promotes rapid chip evacuation and lowers thermal accumulation, ideal for dense and heat-sensitive materials like stainless steel.
Optimized Cutting Angles - Precisely engineered tip and helix angles maximize cutting efficiency and reduce tool wear, supporting longer tool life.
Application-Specific Coating Compatibility - Fully compatible with heat-resistant and wear-resistant coatings (e.g., TiAlN, TiCN) to ensure consistent performance in tough industrial environments.
Q1: What materials and coatings are available for your M35 drill bits?
Materials: This premium set features M35 cobalt high-speed steel, renowned for its excellent wear resistance, heat stability, and performance in tough metals. We also offer alternatives such as M2, M42, and powder metallurgy HSS for specific application needs.
Coatings:
TiN - Versatile for general-purpose use
TiAlN - Ideal for high-heat applications
TiCN - Offers maximum surface hardness and abrasion resistance
Uncoated versions are available for cost-sensitive or customized requirements.
Note: The correct coating can extend tool life by 2-3 times, especially when drilling materials such as stainless steel or titanium alloys.
Q2: What causes premature wear or breakage in drill bits?
Operational Factors:
Excessive feed pressure
Lack of cutting fluid
Drilling at improper speeds
Always ensure adequate cooling and lubrication to reduce friction and prevent thermal damage.
Selection Errors:
Using general HSS bits on hard metals
For stainless steel or heat-treated alloys, M35 or coated drills are highly recommended.
Support: We offer technical assistance and will consider replacements for any issues due to manufacturing defects (non-user damage).
Q3: How do I know when the drill bit needs to be replaced?
Warning signs include:
Visible surface finish deterioration
Hole diameter deviation of more than 0.1 mm
Abnormal vibration or noise during operation
Tip: Use a magnifier to check for micro-chipping or edge rounding as part of regular inspection.
Q4: What helix angle is best for different materials?
30°-35° (Standard Helix): Suitable for carbon steel, alloy steel, and cast iron
40°-45° (High Helix): Best for soft metals such as aluminum and copper
10°-20° (Low Helix): Ideal for hardened or heat-treated steel, reduces vibration and increases stability
Q5: Can I order non-standard or customized drill bits?
Yes. We offer fully customized M35 drill bit solutions, including:
Step drills
Special cutting tip geometries
Internal coolant holes
Customized flute lengths, helix angles, or shank types
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