| Customization: | Available |
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| Customized: | Customized |
| Standard: | GB/T |
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Wide Material Compatibility
Engineered for use on tough materials like stainless steel, alloy steel, cast iron, and other hard metals, this M35 cobalt drill set delivers reliable performance across a wide range of industrial, mechanical, and construction applications.
Consistent Precision Drilling
Each drill bit is crafted with sharp CNC-ground cutting edges and a balanced spiral design, minimizing vibration and ensuring precise, accurate drilling-ideal for high-demand, repetitive tasks.
Thermally Enhanced Durability
Made from premium M35 high-speed steel with cobalt infusion, these drill bits undergo advanced heat treatment, resulting in outstanding hardness retention, wear resistance, and stability even in high-temperature drilling conditions.
Versatile Usage Scenarios
Perfect for a variety of tasks such as electrical work, metal fabrication, equipment assembly, and general metalworking. Their versatility minimizes the need for frequent tool changes, improving operational efficiency and productivity.
Flexible Sizing and Configurations
Available in both standard metric and inch sizes, these drill bits can be customized with options such as flute length, coating, and shank type to meet specific project or equipment requirements.
1)Stainless Steel
2)Mold Steel
3)Copper Alloy
4)Aluminum Alloy
5)Cast Iron
6)PVC
Precision-Crafted Cutting Edge
Manufactured from high-performance M35 cobalt HSS, these drill bits provide fast, low-resistance cutting into tough materials such as stainless steel and hardened alloys. The result is superior edge sharpness and reliable drilling performance that lasts longer.
Stable Ground Tip for Accurate Starts
With a fully ground tip, these drill bits offer clean positioning and stable entry into workpieces, minimizing wandering and ensuring high accuracy. This feature is especially valuable for high-speed or handheld operations where precision is essential.
High-Efficiency Chip Removal
The optimized spiral flute geometry facilitates smooth chip evacuation, reducing friction-induced heat. This allows for continuous drilling in demanding environments without the risk of clogging or overheating, ensuring efficiency in extended applications.
Rust-Resistant Polished Finish
The polished surface offers excellent corrosion resistance, safeguarding the drill bits against humidity and oxidation. This not only prolongs the tool's life but also maintains its professional appearance in workshop and industrial environments.
Comfortable, Balanced Operation
Designed with a lightweight and evenly distributed structure, these drill bits provide greater control and reduce operator fatigue. This ergonomic design makes them perfect for repetitive drilling tasks, especially in professional settings or high-volume production lines.
Available Sizes:
| Specification | Cutting Diameter | Overall length | Blade length |
| 3 | 33mm | 61mm | 3mm |
Proven Wear Resistance & Heat Stability
Crafted from premium M35 cobalt alloy high-speed steel, these twist drills are designed to maintain their sharpness and strength during extended drilling operations in high-temperature and high-load conditions, making them ideal for tough materials like stainless steel and hardened alloys.
Wide Material Compatibility
These drills are engineered for versatility, able to handle stainless steel, carbon steel, alloy steel, cast iron, and non-ferrous metals with ease. This makes the set perfect for both large-scale industrial production and small-batch workshop needs.
Flexible Size and Specification Range
Offered in a wide range of diameters and lengths (from 1mm to 13mm or custom sizes upon request), these drills accommodate various hole sizes and machining tolerances, giving professionals the precision and flexibility they need for different applications.
Industrial-Grade Reliability for Every Task
Whether you're working on fabrication, construction, automotive repair, electrical work, or DIY projects, these M35 cobalt drill bits provide smooth chip removal and reduced vibration, ensuring reliable and consistent performance with every drill.
1. Precision Manufacturing for Consistent Results
CNC Precision Grinding: Ensures sharp flute profiles and consistent tip angles, delivering stable, low-vibration drilling across a wide range of sizes, from 1mm to 13mm and beyond.
Vacuum Heat Treatment: Improves surface hardness and internal strength, ensuring maximum durability during high-load, industrial drilling.
Ultra-Fine Polishing: Enhances chip evacuation and minimizes heat buildup, protecting both the drill bit and the workpiece for more efficient drilling.
2. Superior Material Purity & Metallurgy
EAF + LF + VD + RS ESR Steelmaking: Uses advanced steelmaking techniques to produce ultra-clean, high-toughness M35 cobalt alloy with fewer impurities, crucial for improved edge durability and resistance to breakage.
RS ESR Edge Enhancement: Refines the cobalt and carbide structure, enhancing wear resistance and preventing premature dulling in high-speed, high-friction environments.
3. Thermal Hardening for Longevity
Cryogenic Treatment + Tempering: Reaches hardness levels up to HRC 67 while maintaining toughness, minimizing the risk of micro-cracks under extreme loads and ensuring longer tool life.
4. Configurable Engineering for Specific Applications
M35-Centric Design: Focuses on M35 cobalt for an ideal balance of hardness and wear resistance, especially suited for stainless steel and other tough metals.
Custom Geometry & Coatings: Available in various flute lengths, helix angles, and PVD coatings (such as TiN, TiAlN, TiCN) to optimize performance for specific materials and cutting conditions.
Key Structural Enhancements
High-Efficiency Flute Design: Designed for fast chip removal and cool operation, even during deep hole drilling or high-speed tasks.
Optimized Tip Geometry: Precision-ground cutting edges help reduce bit wear, increasing drilling accuracy and consistency.
Application-Specific Surface Options: Choose from uncoated or coated bits, depending on the target material and desired tool lifespan.
Q1: What sizes are available in your M35 twist drill range?
A: Our standard set includes sizes from 1mm to 13mm in 1mm increments (12 pcs). We also offer fractional, metric, and letter sizes, along with custom dimensions available upon request.
Q2: What materials can these drill bits cut through effectively?
A: These M35 cobalt alloy drill bits are designed to handle tough materials such as:
Stainless steel
Alloy steel
Cast iron
Carbon steel
They also work efficiently on aluminum, plastics, and wood, making them versatile for multi-material applications.
Q3: What makes M35 cobalt drills more reliable than standard HSS bits?
A: M35 cobalt alloy contains 5% cobalt, offering:
Higher red hardness (better heat resistance)
Superior wear resistance
Longer edge retention during high-speed and high-pressure drilling
This makes M35 cobalt drill bits ideal for demanding tasks, especially when working with hard metals.
Q4: Do you offer coated and uncoated versions?
A: Yes. Our drill bits are available with the following coatings:
TiN (Titanium Nitride): For general-purpose wear resistance
TiAlN (Titanium Aluminum Nitride): For high-temperature applications
TiCN (Titanium Carbonitride): For harder surfaces and extended tool life
Uncoated versions are also available for standard or cost-sensitive applications.
Q5: Can I order custom specifications or bulk quantities?
A: Yes, we offer:
Custom flute lengths or helix angles
Step drills, internal coolant holes
Special point geometries
Bulk/industrial packaging options
Just provide a drawing or specification, and we'll accommodate your needs.
Q6: How should I maintain these drill bits to extend their life?
A: To ensure longevity:
Use the appropriate cutting fluid for metal drilling
Avoid excessive feed rates or dry drilling
Regularly inspect tips for wear or chipping
Store drill bits in a dry, organized case to prevent corrosion
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