Drill bit Abraboro HSS conical for metal 8.5 mm AB44508500

Abraboro HSS conical drill bit for metal, diameter 8.5 mm, is designed for cutting and enlarging holes in ferrous and non-ferrous metals. Manufactured from high-speed steel (HSS), the conical geometry provides a tapered cutting profile that enables stepped hole diameters and gradual material removal. The bit is suitable for use in hand-held drills and drill presses and intended for workshop and industrial applications where controlled hole shaping and deburring are required.

Advantages

The HSS material ensures wear resistance and sustained cutting performance when working with steel, aluminum and other metals. The conical shape offers gradual cutting action that reduces the risk of sudden catches and allows controlled enlargement of existing holes. Compatibility with common drilling equipment makes it versatile for both manual and machine-guided operations. The tool’s geometry also facilitates smoothing and deburring of hole edges during machining.

Suitable for

• Countersinking and stepped hole creation in sheet metal and plates
• Enlarging or finishing drilled holes to precise tapered diameters
• Deburring and chamfering internal hole edges
• Use with hand-held drills and drill presses in workshops or production environments

Key specifications

• Material: high-speed steel (HSS)
• Geometry: conical / tapered cutting profile
• Nominal diameter: 8.5 mm
• Intended materials: ferrous and non-ferrous metals
• Suitable equipment: hand-held electric drills and drill presses

How to use

Secure the workpiece to prevent movement and select an appropriate clamp or vice. Choose the correct drill speed for the material being machined—lower speeds for harder steels and higher speeds for softer non-ferrous metals. Insert the conical HSS bit into the chuck and ensure it is centered and tightened. Apply steady, controlled feed pressure while allowing the conical profile to progressively cut the material. Withdraw the bit periodically to clear chips and check hole dimensions. Use cutting fluid as needed to reduce heat and extend tool life.

Usage recommendations

For best results, use cutting fluid appropriate to the metal type, maintain moderate drilling speeds, and avoid excessive axial force to prevent tool wear or breakage. Inspect and deburr finished holes with a suitable tool if required.