Drill bit set ALPEN HSS-E cobalt metal spiral 19-piece (MPN 102219100)

ALPEN HSS-E cobalt 19-piece spiral drill bit set is a selection of high-speed steel cobalt alloy twist drills designed specifically for drilling metal. The set includes a comprehensive range of sizes for general metalworking, through-holes and maintenance tasks. Cobalt-enriched HSS-E construction improves heat resistance and wear performance compared with standard HSS, making these bits suitable for repeated drilling in steel and other hard metals.

Advantages

The cobalt alloy in these HSS-E twist drills increases red-hardness and maintains cutting edge integrity at higher temperatures, resulting in longer tool life during continuous or heavy-duty drilling. Spiral (twist) geometry ensures efficient chip evacuation and consistent concentricity, while precision-ground flutes and point geometry provide reliable centring and reduced walking on metal surfaces. The assortment of sizes reduces the need for frequent tool changes and covers common hole diameters used in workshop and maintenance environments.

Suitable for

• Drilling through-holes in mild steel, alloy steels and stainless steel in workshop environments
• Maintenance and repair tasks on machinery and equipment
• Industrial and fabrication applications requiring durable drill bits
• General metalworking and preparation for tapping or reaming

Key specifications

• Material: high-speed steel with cobalt alloy for improved heat resistance
• Geometry: spiral (twist) drill design with precision-ground flutes
• Finish: ground cutting edges and point geometry for reduced walking
• Set size: 19 pieces covering a range of commonly used diameters for metal drilling
• Intended use: designed for drilling steel and other hard metals

How to use

Select the appropriate drill bit size for the required hole diameter and secure the bit firmly in the chuck. Use a suitable drill press or handheld drill with adequate speed control for metalworking; start at a lower speed for larger diameters and harder materials, increasing speed as appropriate. Apply steady feed pressure, keep the drill perpendicular to the workpiece, and use cutting fluid or coolant to reduce heat buildup and improve chip evacuation. Clear chips regularly and inspect the bit for wear to maintain hole quality.

Usage recommendations

For prolonged tool life and consistent hole quality, use appropriate cutting lubricant when drilling steel, select lower speeds for stainless and high-alloy steels, and avoid excessive lateral force. Store the set in its case to protect ground edges and maintain organisation of sizes.