Drill bit for metal Tvardy HSS M35 6 mm — cobalt high-speed steel

Tvardy HSS M35 cobalt drill bit, 6 mm diameter, is engineered for drilling metal including stainless steel and other hard alloys. Manufactured from high-speed steel with 5% cobalt (M35), this 6 mm drill bit combines increased hardness and improved heat resistance to maintain cutting performance under demanding conditions. It is suitable for use with handheld electric drills and drill presses in workshop and industrial environments where wear resistance and durability are important.

Advantages

The M35 cobalt composition provides higher red-hardness and prolonged edge life compared with standard HSS, reducing frequent tool changes when working with hardened and stainless steels. The 6 mm diameter offers a balance between rigidity and versatility for through-holes, pilot holes, and bracketwork. Ground flutes and a precision point geometry ensure stable centering, efficient chip evacuation and consistent hole quality in tough materials.

Suitable for

• Drilling stainless steel and heat-treated alloys
• Metal fabrication and maintenance tasks
• Pilot holes and through-holes in sheet and plate
• Use in hand drills and drill presses

Key specifications

• Material: High-speed steel with 5% cobalt (M35)
• Nominal diameter: 6 mm
• Intended use: Metal drilling, including stainless steel and hard alloys
• Shank type: straight round shank for standard chucks
• Tip/point: precision ground for improved centering
• Flute design: spiral flutes for effective chip removal

How to use

Select an appropriate drilling speed and coolant depending on the workpiece material and thickness. Clamp the workpiece securely, mark the drilling position, and start at a low speed to establish the center before increasing to the recommended RPM for 6 mm M35 HSS in the given material. Apply steady feed pressure without forcing; use cutting oil or coolant when drilling stainless steel or other heat-sensitive alloys to reduce temperature and extend tool life.

Usage recommendations

For best results when drilling stainless steel or hardened materials, use moderate spindle speeds, consistent feed, and appropriate cutting fluid. Re-sharpen or replace the drill when wear reduces cutting efficiency. Store the drill bit dry and protected to prevent corrosion and preserve geometry.