Drill bit Tvardy HSS M35 cobalt for metal 7.5 mm

Tvardy HSS M35 cobalt drill bit, 7.5 mm diameter, is engineered for precise metal drilling. Made from high-speed steel with an M35 cobalt alloy, this 7.5 mm drill bit offers increased hardness and improved heat resistance compared with standard HSS. It is shaped for stable cutting performance in stainless steel, hardened steels and other tough alloys. The geometry and material make the bit compatible with both hand drills and drill presses used in metalworking, maintenance and fabrication tasks.

Advantages

The M35 cobalt composition provides higher red hardness and wear resistance, allowing longer life under elevated temperatures and continuous drilling. The 7.5 mm diameter gives a balance between rigidity and cutting speed for medium-sized holes. The tip geometry and flute design promote efficient chip evacuation and consistent centering, reducing walking on entry when used with appropriate pilot methods. Suitable for repeated use on stainless steel and other hard materials where standard HSS bits would dull more quickly.

Suitable for

• Drilling through stainless steel sheets and plates
• Creating holes in hardened steels and high-alloy materials
• General metal fabrication and maintenance work
• Use with handheld drills and drill presses in workshop environments

Key specifications

• Material: High-speed steel with M35 cobalt alloy
• Diameter: 7.5 mm
• Intended material: Stainless steel, hardened steel, and other tough alloys
• Recommended machines: Hand drills and drill presses
• Finish: Precision-ground flutes and point geometry for chip removal and centering

How to use

Select an appropriate drilling speed and feed for metal work — lower speeds for harder materials, higher speeds for softer metals — and secure the workpiece to prevent movement. Use cutting fluid or coolant when drilling stainless steel or hardened materials to reduce heat build-up and extend tool life. Start with a center punch or a pilot drill if accurate positioning is required. Apply steady pressure and allow the drill to cut without forcing; periodically withdraw the bit to clear chips if necessary.

Usage recommendations

For best results when drilling stainless steel or other hard alloys, use moderate spindle speeds, adequate cutting fluid, and firm clamping. Replace or re-sharpen the bit when wear affects cutting performance to maintain hole quality and prevent workpiece damage.