Drill bit Abraboro HSS conical for metal 20 mm AB44520000

Conical HSS drill bit Abraboro for metal, 20 mm diameter. This tool is manufactured from high-speed steel (HSS) and features a conical geometry designed for enlarging holes, countersinking, and step-drilling in a range of metal materials. The shank is compatible with standard drill chucks, making the bit suitable for workshop, maintenance and industrial metalworking environments where a precise 20 mm conical hole or stepped bore is required.

Advantages

The high-speed steel construction provides good hardness and wear resistance for drilling into ferrous and non-ferrous metals. The conical profile allows gradual material removal and smooth transition when enlarging existing holes or creating countersinks. Compatibility with standard chucks enables quick tool changes and use with most bench and hand drills. The single-piece design reduces vibration and improves concentricity during drilling.

Suitable for

• Enlarging existing holes in steel, aluminum and other metals
• Countersinking preparation for fasteners and rivets
• Step-drilling operations where a conical profile is required
• Workshop and maintenance drilling tasks on metal components

Key specifications

• Material: high-speed steel (HSS)
• Geometry: conical (tapered) cutting profile
• Nominal diameter: 20 mm
• Intended materials: ferrous and non-ferrous metals
• Mounting: compatible with standard drill chucks (cylindrical shank)

How to use

Secure the drill bit in a suitable drill chuck and ensure it is tightened firmly. Mark the drilling location and, if necessary, start with a pilot hole to guide the conical bit. Use appropriate cutting speed and steady feed for the metal being worked—lower speeds for harder alloys, higher speeds for softer metals. Apply cutting fluid or lubricant when drilling steel or harder materials to reduce heat and prolong tool life. Remove chips regularly and allow the bit to cool during extended operations.

Usage recommendations

Use a drill or drill press that offers stable support and speed control. Begin with a smaller pilot hole for greater accuracy when enlarging existing holes. Select cutting fluid suited to the material and clean the bit after use to prevent corrosion and maintain cutting performance.