| Customization: | Available |
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| Customized: | Customized |
| Standard: | GB/T |
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1. Wide Material Compatibility
Crafted for use on stainless steel, alloy steel, cast iron, and other challenging metals, this M35 cobalt drill set ensures dependable drilling performance across a broad spectrum of industrial, mechanical, and construction environments.
2. Consistent Precision Drilling
Each bit features sharp CNC-ground cutting edges and balanced spiral geometry to reduce vibration and enhance accuracy-ideal for repetitive drilling in high-demand settings.
3. Thermally Enhanced Durability
Built from premium M35 high-speed steel with cobalt infusion, the drills undergo advanced heat treatment, resulting in excellent hardness retention, wear resistance, and stability in high-temperature applications.
4. Versatile Usage Scenarios
Designed to support multiple tasks including electrical work, fabrication, equipment assembly, and general metalworking. This versatility reduces tool changes, streamlining operations and boosting productivity.
5. Flexible Sizing and Configurations
Available in standard metric and inch sizes, with custom options (flute length, coating, shank type) available upon request to meet specific project or equipment needs.
1)Stainless Steel
2)Mold Steel
3)Copper Alloy
4)Aluminum Alloy
5)Cast Iron
6)PVC
1. Precision-Crafted Cutting Edge
Made from high-performance M35 cobalt HSS, each bit delivers rapid, low-resistance cutting into tough materials like stainless steel and hardened alloys-ensuring extended edge sharpness and reliable drilling performance.
2. Stable Ground Tip for Accurate Starts
A fully ground tip ensures clean positioning and stable entry into workpieces, minimizing wandering and maximizing accuracy-especially useful in high-speed or hand-held operations.
3. High-Efficiency Chip Removal
Optimized spiral flute geometry promotes smooth chip evacuation and reduces friction-induced heat, enabling continuous drilling in demanding environments without clogging or overheating.
4. Rust-Resistant Polished Finish
The corrosion-resistant polished surface protects against humidity and oxidation, maintaining both tool longevity and professional appearance in workshop and industrial conditions.
5. Comfortable, Balanced Operation
Lightweight, evenly distributed design offers greater control and reduces operator fatigue, ideal for repetitive drilling in professional settings or production lines.
Available Sizes:
| Specification | Cutting Diameter | Overall length | Blade length |
| 3 | 33mm | 61mm | 3mm |
1. Proven Wear Resistance & Heat Stability
Made from premium M35 cobalt alloy high-speed steel, these twist drills maintain edge sharpness and core strength during prolonged drilling in high-temperature, high-load environments-ideal for stainless steel and other hard metals.
2. Wide Material Compatibility
Engineered for versatile use across stainless steel, carbon steel, alloy steel, cast iron, and non-ferrous metals-this set adapts well to both industrial production lines and small-batch workshop needs.
3. Flexible Size and Specification Range
Offered in a comprehensive range of diameters and lengths (e.g., 1mm-13mm or custom), the set accommodates various hole sizes and machining tolerances-ideal for professionals requiring precision and flexibility.
4. Industrial-Grade Reliability for Every Task
Suitable for fabrication, construction, automotive repair, electrical work, and DIY, these bits ensure smooth chip removal and low vibration, delivering consistent performance with every cut.
CNC Precision Grinding: Guarantees sharp flute profiles and uniform tip angles, enabling stable, low-vibration drilling across all sizes from 1mm to 13mm and beyond.
Vacuum Heat Treatment: Enhances surface hardness and internal strength, maximizing durability during high-load industrial use.
Ultra-Fine Polishing: Improves chip evacuation and minimizes heat buildup, protecting both the drill bit and the work surface.
EAF + LF + VD + RS ESR Steelmaking: Produces ultra-clean, high-toughness M35 cobalt alloy with fewer impurities-critical for edge durability and resistance to breakage.
RS ESR Edge Enhancement: Refines the cobalt and carbide structure for increased wear resistance under high-speed, high-friction cutting.
Cryogenic Treatment + Tempering: Reaches up to HRC 67 without sacrificing toughness, minimizing the risk of micro-cracks under extreme loads.
M35-Centric Design: Prioritizes M35 for its ideal balance of hardness and wear resistance, especially in stainless steel or hard metal applications.
Custom Geometry & Coatings: Available in various flute lengths, helix angles, and advanced PVD coatings (TiN, TiAlN, TiCN) to suit different materials and cutting conditions.
High-Efficiency Flute Design: Supports fast chip clearance and cool operation-even in deep hole or high-speed environments.
Optimized Tip Geometry: Precision-ground cutting edges reduce bit wear and boost drilling accuracy.
Application-Specific Surface Options: Choose from uncoated or coated bits to match target material types and performance lifespan.
Q1: What sizes are available in your M35 twist drill range?
A: Our standard set includes 1mm to 13mm in 1mm increments (12 pcs). We also offer fractional, metric, and letter sizes, as well as custom dimensions upon request.
Q2: What materials can these drill bits cut through effectively?
A: These M35 cobalt alloy bits are engineered for tough materials including:
Stainless steel
Alloy steel
Cast iron
Carbon steel
They also work well on aluminum, plastics, and wood in multi-material job environments.
Q3: What makes M35 cobalt drills more reliable than standard HSS bits?
A: M35 contains 5% cobalt, offering:
Higher red hardness (heat resistance)
Better wear resistance
Longer edge retention under high-speed or high-pressure drilling
This makes them ideal for prolonged use on hard metals.
Q4: Do you offer coated and uncoated versions?
A: Yes. Available coatings include:
TiN (Titanium Nitride): General purpose wear resistance
TiAlN (Titanium Aluminum Nitride): High-temperature applications
TiCN (Titanium Carbonitride): For harder surfaces and longer tool life
Uncoated bits are available for standard or cost-sensitive use.
Q5: Can I order custom specifications or bulk quantities?
A: Absolutely. We support:
Custom flute length or helix angle
Step drills, internal coolant holes
Special point geometries
Bulk/industrial packaging options
Just provide a drawing or specification to start.
Q6: How should I maintain these drill bits to extend their life?
A:
Use proper cutting fluid for metal drilling
Avoid excessive feed rate or dry drilling
Inspect tips for wear or chipping regularly
Store in dry, organized cases to avoid corrosion
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