Drill bit Art-Pol cobalt cylindrical for metal 15 mm (model 52150)

The Art-Pol cobalt cylindrical drill bit 15 mm is designed for drilling into steel and other ferrous metals. Made from high-alloy tool steel with added cobalt, this 15 mm diameter drill bit offers improved heat resistance and extended wear life compared with standard high-speed steel bits. Its cylindrical shank makes it compatible with handheld drills and drill presses, providing stable mounting for workshop repairs, fabrication and general metalworking tasks.

Advantages

High-cobalt alloy construction increases hardness at elevated temperatures, reducing premature dulling when drilling hard steels. The 15 mm cutting diameter produces a clean, consistent hole appropriate for through-holes and clearance drilling. A straight cylindrical shank ensures reliable grip in standard chucks and reduces runout when used in bench drills. The overall design balances toughness and cutting performance for repeated use in metalworking environments.

Suitable for

• Drilling through mild steel, alloy steel and other ferrous metals
• Workshop repairs and maintenance tasks
• Fabrication and assembly where 15 mm holes are required
• Use with handheld electric drills and drill presses

Key specifications

• Cutting diameter: 15 mm
• Material: high-alloy tool steel with cobalt content
• Shank type: cylindrical (straight) shank for standard chucks
• Intended material: ferrous metals (steel and similar alloys)
• Typical applications: through-holes, clearance holes and general metal drilling

How to use

Secure the drill bit in the chuck so the cylindrical shank is fully seated and tightened. When drilling metal, use an appropriate cutting speed and steady feed; lower speeds are recommended for larger diameters to limit heat buildup. Apply cutting fluid or lubricant during drilling to improve tool life and reduce friction. Withdraw the bit periodically to clear chips and prevent clogging. After use, clean and store the bit in a dry place to avoid corrosion.

Usage recommendations

For best results, select a drilling speed appropriate to the specific steel grade and maintain moderate pressure. Use a suitable cutting fluid, especially when drilling hardened or alloy steels, and ensure the drill is aligned to minimize side loads that can cause breakage.