| Customization: | Available |
|---|---|
| Customized: | Customized |
| Standard: | GB/T |
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Optimized for Hard Metals
Built to tackle stainless steel, alloy steel, cast iron, and other challenging materials, this M35 cobalt twist drill ensures reliable cutting across metal fabrication, machining, and structural work.
Precision Engineering for Clean Cuts
Featuring sharpened cutting edges and balanced spiral flutes, each bit delivers accurate, low-vibration drilling, essential for both manual and machine-assisted operations.
Heat-Resistant, Wear-Resistant Construction
Made from M35 high-speed steel with cobalt alloy, the drills undergo advanced heat treatment, enhancing core hardness and resisting deformation or edge dulling in high-temperature, high-load conditions.
Multi-Purpose Use in Demanding Environments
Ideal for electrical installations, mechanical workshops, construction sites, and general-purpose industrial drilling-this tool reduces the need for multiple drill types, increasing overall efficiency and tool versatility.
1)Stainless Steel
2)Mold Steel
3)Copper Alloy
4)Aluminum Alloy
5)Cast Iron
6)PVC
High-Strength Cutting Edge
Made from M35 cobalt alloy high-speed steel, the drill bits provide fast, clean entry into hard metals such as stainless steel and alloy steel, with minimal resistance and prolonged edge sharpness.
Precision-Ground Tip for Accurate Start
The fully ground tip allows for stable, centered positioning, reducing bit drift and ensuring clean starts, especially in high-speed or punch-through drilling applications.
Efficient Chip Removal Design
Advanced spiral flute geometry enhances chip flow, minimizing clogging and heat buildup-key for long drilling sessions or high-volume industrial use.
Corrosion-Resistant Polished Finish
The drill surface is polished for a sleek, rust-resistant coating, helping the tool stay clean and durable even in humid or workshop environments.
Ergonomic & Balanced for Extended Use
With a lightweight structure and well-distributed mass, this design ensures smooth handling, less operator fatigue, and improved control for precision drilling over time.
Available Sizes:
| Specification | Cutting Diameter | Overall length | Blade length |
| 1.5 | 40mm | 18mm | 1.5mm |
Exceptional Hardness & Heat Resistance
Manufactured from M35 cobalt high-speed steel, these drill bits maintain their cutting edge and core strength even during high-friction, high-temperature metal drilling, significantly reducing wear.
Reliable Performance Across Hard Materials
Optimized for stainless steel, hardened alloys, carbon steel, and cast iron, making it an ideal choice for challenging industrial cutting environments and heavy-duty workshop applications.
All-in-One Drilling Efficiency
Whether in professional fabrication, maintenance, or construction, or DIY metalworking, this set ensures clean, accurate drilling results, streamlining workflow and reducing tool changeovers.
CNC Precision Grinding
Ensures uniform flute geometry and sharp tip angles, supporting stable, accurate drilling even under continuous high-speed operations.
Vacuum Heat Treatment
Improves both surface hardness and core toughness, maximizing tool life under heavy-duty metal cutting applications.
Ultra-Fine Polishing
Reduces friction and chip adhesion, helping dissipate heat faster and protect metal surfaces from scoring or deformation.
EAF + LF + VD + RS ESR Metallurgy
Produces high-purity M35 cobalt steel with minimal inclusions and high structural integrity-perfect for cutting hardened or high-alloy steels.
Quenching + Cryogenic + Tempering
Achieves hardness up to HRC 67, with excellent resistance to cracking and distortion during high-friction metal drilling.
RS ESR Rapid Solidification
Uniforms the cobalt and carbide particle layout at the cutting edge, improving thermal resistance and maintaining sharpness in deep or continuous drilling tasks.
M35-Focused Composition
Prioritizes M35 steel for superior performance in stainless steel, high-tensile alloy, and precision metal cutting. Options for M2 and M42 are also available upon request.
Tailored Designs
Support for custom flute lengths, helix angles, and coatings such as TiN, TiAlN, and TiCN, ideal for material-specific challenges or extended tool life.
High-Efficiency Flute Geometry - Fast chip evacuation, minimal clogging.
Precision Cutting Angles - Reduced edge wear, smoother metal penetration.
Advanced Surface Coatings - For heat-resistance, wear protection, and high-load performance.
Q1: What materials and coatings are available for your M35 drill bits?
Materials: Our main material is M35 cobalt high-speed steel, engineered for superior heat resistance and durability in metal cutting. We also provide M2, M42, and powder-metallurgy HSS options for specialized tasks.
Coatings: Available coatings include TiN (general use), TiAlN (for high-temperature environments), and TiCN (maximum surface hardness). Uncoated variants are available upon request for cost-efficiency or special machining setups.
Note: The right coating extends tool life significantly, especially when drilling stainless steel, titanium alloys, or hard metals.
Q2: What causes premature wear or failure in metal-cutting drills?
Operational errors: Overfeeding, dry drilling, or poor cooling are common causes. Always use cutting fluid to reduce friction and overheating.
Material mismatch: For tough metals like heat-treated steel or inox, avoid basic HSS. Use M35 or coated drills for better performance.
Support: We offer technical guidance and will assess replacements for factory-related defects (non-user damage).
Q3: How do I know when the drill bit needs to be replaced?
Watch for:
Rough or uneven hole finishes
Hole diameter deviation over 0.1mm
Abnormal noise or vibration during use
Pro Tip: Regularly inspect cutting edges under magnification to check for chipping or rounding.
Q4: Which helix angle is best for which materials?
30°-35° (Standard): General purpose - carbon steel, alloy steel, cast iron
40°-45° (High Helix): Ideal for soft metals - aluminum, copper
10°-20° (Low Helix): Suitable for hard or heat-treated steels - helps reduce chatter and enhance edge control
Q5: Can I customize my M35 drill bit order?
Absolutely. We provide custom-engineered solutions, including:
Step drills
Non-standard point angles
Internal coolant channels
Special flute lengths, helix angles, or shank styles
Note: Technical drawings are required for all non-standard designs.
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