Cobalt-Coated Imperial M2 HSS Straight Shank Drill Bit

I. Model Specifications

     M35 Cobalt Straight Shank Series (Standard Type)

• Metric Sizes: 0.5mm to 13.0mm (Graduated in 0.1mm increments, full range available).
• Imperial Sizes: 1/16" to 1/2" (Common sizes fully stocked).
• Packaging: Individually packed for precise and flexible selection by professionals.

II. Material Description

• Genuine M35 Cobalt Steel: Stanbal cobalt drill bits are entirely crafted from industrial-grade M35 high-speed steel (HSS) with the addition of 5% Cobalt.
• Advanced Hardness and Heat Resistance: While industrial-grade M2 HSS already offers excellent cutting performance, M35 cobalt steel takes hardness and red hardness (high-temperature resistance) to the extreme. Through rigorous precision overall heat treatment, the 5% cobalt composition significantly enhances heat and wear resistance, preventing softening due to annealing even under continuous high-temperature drilling and extending tool service life.
• International Standards: Strictly complies with DIN international standard dimensions, ensuring high construction precision and cutting stability.
• Designed for Ultra-Hard, Difficult-to-Cut Materials: Engineered with industrial alloy standards and an optimized 118-degree split point design, specifically developed for high-intensity construction and high-hardness metal objects. Features precise centering without slipping, extremely fast cutting speeds, and tight tolerances, drastically boosting work efficiency.

III. Product Features

• Genuine M35 Cobalt Steel: Contains 5% cobalt, providing high temperature and red hardness. Maintains strong cutting performance even after multiple sharpenings.
• High-Efficiency Cutting: Unique dual-spiral polished flutes and optimized angles ensure smooth chip evacuation without clogging, effectively preventing overheating and tool snapping.
• Professional Endorsement: Deeply rooted in the market for over 30 years, winning high praise from professional hardware stores and tool shops.
• Field-Tested Proof: Search for "STANBAL stainless steel drill bit test" on YouTube to watch the impressive actual performance.

IV. Usage and Maintenance Guide

[Correct Usage]

• Material Compatibility: This product is suitable for stainless steel (304/316), high-carbon steel, mold steel, titanium alloy, cast iron, as well as alloy steel, aluminum alloy, wood, and plastics. When drilling high-hardness materials (such as stainless steel), always apply an appropriate amount of water or cutting fluid for cooling to extend tool life.
• Equipment Matching: This series features a straight round shank design, suitable for standard three-jaw chucks on various handheld electric drills, bench drill presses, or lathes. For use with quick-change impact drills, please refer to the "Hex Shank Series" in our store.
• Speed Control: The larger the drill hole diameter, the slower the drill speed should be set. High-speed blind drilling is strictly prohibited to prevent drill bit overheating and damage. When drilling stainless steel, always use the correct operating technique of "low speed and heavy pressure."

[Daily Maintenance]

• Cleaning and Protection: After use, clear residual iron chips and debris from the flute grooves, wipe away oil, sweat, or cutting fluid with a clean cloth, and store in a dry environment.
• Regular Oiling: If not in use for an extended period, apply a thin layer of rust-preventive or lubricating oil to the metal surface to maintain material performance.
• Storage Management: After using an individual drill bit, it is recommended to store it properly in a moisture-proof tool case or dedicated drill rack to avoid edge damage caused by collisions.