| Customization: | Available |
|---|---|
| Customized: | Customized |
| Standard: | GB/T |
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Reliable Multi-Material Drilling
Crafted from M35 cobalt steel, these twist drills are designed to handle stainless steel, hardened alloy steel, cast iron, and other tough metals with consistent performance-ideal for industrial, fabrication, and construction sectors.
Precision Engineering for Accuracy
Each drill bit features CNC-ground cutting edges and optimized flute geometry, ensuring smooth entry, low runout, and minimal vibration-perfect for continuous, high-accuracy drilling tasks.
Enhanced Hardness & Wear Resistance
Through vacuum heat treatment and cobalt reinforcement, the bits offer excellent thermal stability and edge retention, making them suitable for high-speed, high-friction drilling environments.
Adaptable Across Applications
From electrical installations to metalworking, construction, and mechanical repairs, this set eliminates the need for frequent tool changes-streamlining workflow for both professionals and advanced DIY users.
Configurable Specifications Available
This product line supports customization of flute length, helix angle, shank style, and coating (e.g., TiN, TiAlN) to meet specific operational or material-handling requirements.
1)Stainless Steel
2)Mold Steel
3)Copper Alloy
4)Aluminum Alloy
5)Cast Iron
6)PVC
High-Efficiency Cutting Edge
Made from M35 cobalt high-speed steel, each bit delivers rapid and clean penetration into stainless steel and other hard metals, ensuring low cutting resistance and prolonged edge sharpness.
Precision-Ground Anti-Slip Tip
The fully ground tip ensures accurate initial contact and stable drilling, significantly reducing bit walking and enhancing positioning accuracy under high-speed or impact drilling conditions.
Advanced Chip Evacuation System
Featuring spiral flute geometry, the drill design promotes smooth chip flow and prevents clogging, which reduces thermal buildup and supports long-cycle operation.
Durable Anti-Corrosion Finish
The polished surface provides both visual refinement and practical benefits, such as enhanced corrosion resistance and longer tool life in humid, oily, or industrial environments.
Ergonomic and Configurable Design
Optimally balanced and lightweight for better control and fatigue reduction. Available in various sizes, flute lengths, and coating options (TiN, TiAlN, etc.), tailored to meet different application needs.
Available size
| Specification | Cutting Diameter | Overall length | Blade length |
| 3 | 33mm | 61mm | 3mm |
Exceptional Durability & Heat Resistance
Manufactured from premium M35 cobalt high-speed steel, these drills maintain cutting hardness and edge sharpness even under prolonged high-temperature, high-friction conditions-ideal for continuous industrial workloads.
Wide Application Adaptability
Designed to handle stainless steel, alloy steel, cast iron, and other tough metals, these twist drills ensure reliable performance in machining, fabrication, and metalworking across industries.
Custom-Fit Versatility
Available in multiple sizes and adaptable geometries, the set supports custom options such as flute length, point angle, and surface coatings-delivering precise, professional-grade results whether on-site or in a workshop.
1. Precision Manufacturing Excellence
CNC Precision Grinding: Ensures consistent flute geometry and cutting angles across each drill bit, enabling reliable, efficient drilling in high-speed, high-volume operations.
Vacuum Heat Treatment: Improves surface hardness and internal toughness, extending tool life under demanding conditions.
Ultra-Fine Polishing: Reduces friction and chip adhesion, enhances heat dissipation, and helps protect the workpiece surface.
2. Refined Metallurgy & Material Purity
EAF + LF + VD + RS ESR Technology: Produces ultra-clean, high-toughness M35 cobalt steel by minimizing impurities, which enhances the bit's durability and resistance to chipping and cracking under thermal or mechanical stress.
3. Integrated Thermal Optimization
Quenching + Cryogenic Treatment + Tempering: Achieves hardness up to HRC 67 while maintaining core toughness to avoid micro-cracking-ideal for hard-metal drilling.
4. RS ESR Edge Enhancement
Rapid Solidification ESR: Optimizes the distribution of carbides and cobalt particles along the cutting edge, enhancing resistance to heat softening and abrasive wear-especially critical for deep-hole or continuous drilling tasks.
5. Flexible Engineering Customization
M35-Focused Configuration: M35 cobalt steel is standard; M2 and M42 options available upon request for different machining needs.
Custom Geometry & Coatings: Available with custom flute lengths, helix angles, shank types, and PVD coatings (e.g., TiN, TiAlN) to match specific materials and applications.
Key Design Adaptations for M35 Twist Drills:
High-Efficiency Flute Design: Facilitates quick chip removal and reduced heat buildup, essential for stainless steel and dense materials.
Optimized Cutting Angles: Precisely matched tip and helix angles to maximize cutting performance and reduce tool wear.
Application-Specific Coatings: Compatible with advanced coatings like TiAlN (for thermal resistance) and TiCN (for wear protection), ensuring extended tool life in industrial environments.
Q1: What is the primary material used in these drills?
A: The drills are made from M35 cobalt high-speed steel, which contains approximately 5% cobalt. This material offers superior heat resistance, wear resistance, and edge retention compared to standard HSS or M2.
Q2: What types of materials can this drill bit cut through?
A: These M35 twist drills are optimized for:
Stainless steel
Carbon steel
Cast iron
Alloy steel
Aluminum, brass, and other non-ferrous metals
They are especially effective on tough or heat-sensitive materials where conventional HSS bits may fail.
Q3: Are custom sizes or geometries available?
A: Yes. We offer fully configurable options including:
Custom flute lengths and helix angles
Special point geometries (e.g., split point, flat point)
Internal coolant holes
PVD coatings (TiN, TiAlN, TiCN)
Step drills or reduced shank styles
(Custom orders require drawings or specifications.)
Q4: What makes M35 better than standard HSS or M2 drill bits?
A: Compared to standard HSS, M35 provides:
Higher hot hardness (up to ~HRC 67)
Better wear resistance under continuous use
Greater longevity when drilling hard materials
This makes M35 ideal for demanding applications in industrial and heavy-duty machining.
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