Drill bit ALPEN 63300800100 HSS Co 8 mm — high-speed cobalt twist drill

ALPEN 63300800100 HSS Co 8 mm twist drill is a high-speed cobalt drill designed for drilling precise holes in a range of metals and demanding materials. Manufactured from high-speed steel with cobalt alloy, the 8 mm diameter bit combines improved heat resistance and hardness to maintain cutting performance under elevated temperatures and prolonged use. The geometry of the point and flute is engineered to provide accurate centring and consistent chip evacuation during standard bench and portable drilling operations.

Advantages

The cobalt alloy in this HSS Co drill increases red hardness, allowing the bit to retain hardness and cutting edge at higher temperatures compared with standard HSS. This improves wear life and reduces the frequency of regrinding or replacement in industrial and workshop environments. The 8 mm diameter is a common size for through-holes and pilot holes, offering compatibility with standard chucks and drill holders. The twist-flute design supports efficient chip removal and stable drilling in tougher materials.

Suitable for

• Drilling steel, stainless steel and other ferrous metals
• Work in alloyed steels and heat-treated materials
• General workshop and industrial drilling tasks
• Pilot holes for tapping or bolt clearance holes

Key specifications

• Material: high-speed steel with cobalt alloy (HSS Co)
• Diameter: 8 mm
• Type: twist drill bit
• Intended use: metalworking and demanding material drilling
• Point and flute geometry: optimized for centring and chip evacuation

How to use

Secure the drill bit in a suitable drill chuck or holder, ensuring correct clamping and alignment. Start drilling at an appropriate speed for the material being worked; lower speeds are recommended for stainless and hardened steels to limit heat buildup. Use cutting fluid or coolant when drilling ferrous metals to improve tool life and chip evacuation. Apply steady, controlled feed pressure to avoid bit wandering and to maintain a clean hole profile. Regrind or replace the bit when wear reduces accuracy or increases drilling force.

Usage recommendations

For prolonged life and consistent results, use the drill bit with appropriate coolant on stainless and high-alloy steels, select drilling speeds based on material hardness, and ensure the workpiece is securely clamped. Regular inspection of the cutting edges and flute clearance helps prevent failure during critical operations.