Drill bit Tvardy HSS M35 cobalt for metal 7 mm

Tvardy HSS M35 cobalt drill bit, 7 mm diameter, is engineered for precision drilling in metals. Constructed from high-speed steel with an M35 cobalt alloy, this drill bit offers increased wear resistance and higher heat tolerance compared with standard HSS bits. It is intended for use in hand drills and drill presses for tasks that require reliable hole-making in stainless steel, hardened steels and other ferrous metals.

Advantages

The M35 cobalt composition provides superior hardness at elevated temperatures, reducing wear and prolonging tool life when cutting hard or heat-sensitive alloys. The 7 mm diameter delivers accurate, repeatable hole sizes suitable for assembly and fabrication. Compatibility with both hand-held drills and stationary drill presses ensures flexibility across workshop and field applications. The bit’s ground geometry improves centring and chip evacuation, supporting cleaner holes and reduced tool binding.

Suitable for

• Drilling stainless steel components
• Working with hardened steels and alloyed ferrous materials
• Metal fabrication, maintenance and repair jobs
• Use in hand drills and drill presses for precision holes

Key specifications

• Material: High-speed steel with M35 cobalt alloy
• Diameter: 7 mm
• Application: Metal drilling (stainless steel, hardened steels, ferrous metals)
• Compatible tools: Hand drills and drill presses
• Cutting geometry: Ground tip for improved centring and chip removal

How to use

Select appropriate drilling speed and feed for the metal type: use lower speeds for stainless and hardened steels to avoid overheating. Secure the workpiece firmly, mark the drilling position and, if necessary, create a centre punch indent to improve centring. Use cutting fluid or coolant when drilling stainless steel or hardened materials to reduce heat and improve tool life. Apply steady, even pressure and withdraw periodically to clear chips when drilling deep holes.

Usage recommendations

For best results, use a suitable cutting lubricant, maintain correct rotational speed for the material, and replace the bit when wear affects hole quality. Avoid side loading and excessive force to prevent breakage and to maximise tool life.