Drill bit for metal Tvardy HSS M35 8 mm — cobalt metal drill

Tvardy HSS M35 8 mm cobalt drill bit is made for accurate and durable metal drilling. Constructed from high-speed steel with an M35 cobalt alloy, this 8 mm drill delivers improved heat resistance and extended tool life when working with stainless steel, hardened steels and other metallic workpieces. The bit is compatible with handheld drills and drill presses and is intended for tasks where precise hole geometry and consistent cutting performance are required.

Advantages

The M35 cobalt composition increases hardness at elevated temperatures, reducing wear during prolonged machining. A ground flute geometry provides reliable chip evacuation and stable cutting action, while the 8 mm diameter balances rigidity and versatility for common metalworking operations. The drill’s construction supports use in both production and workshop environments where repeatable performance is important.

Suitable for

• Drilling stainless steel components
• Working with hardened steel parts
• General metal fabrication and maintenance
• Workshop and light industrial drilling tasks

Key specifications

• Material: High-speed steel with M35 cobalt alloy
• Diameter: 8 mm
• Tip geometry: ground for metal drilling
• Recommended use: manual drills and drill presses
• Suitable workpiece materials: stainless steel, hardened steels, various metals

How to use

Secure the workpiece and select an appropriate drilling speed and cutting fluid for the metal being processed. Clamp the 8 mm drill bit in the chuck ensuring it is centered and tightened. Begin drilling at a controlled feed rate, using coolant or cutting oil when machining stainless steel or hardened materials to reduce heat and improve chip flow. Withdraw periodically to clear chips if deep holes are required.

Usage recommendations

For best results, use moderate speeds and steady feed pressure; increase coolant flow when drilling stainless or heat-prone alloys. Replace the bit when wear or chipping affects hole quality to maintain precision and tool life.