Drill bit Abraboro HSS tapered 25.5 mm AB44525500 for metal

Abraboro HSS tapered drill bit 25.5 mm is designed for precision drilling and controlled hole enlargement in metalwork. Manufactured from high-speed steel (HSS), the tapered geometry enables gradual cutting, countersinking and step-drilling in both ferrous and non-ferrous metals. The bit is suitable for use in manual drills and machine drill tools in workshop and industrial environments where durable cutting performance and heat resistance are required.

Advantages

The high-speed steel construction provides wear resistance and sustained cutting performance at elevated temperatures, reducing the risk of bit deformation during intensive use. The tapered profile delivers smooth material removal and accurate hole enlargement without abrupt jumps in diameter, allowing better control when countersinking or creating stepped holes. The single-piece design ensures stability and alignment when used in chucks and holders common to hand and machine drilling.

Suitable for

• Drilling and enlarging holes in mild and hardened steels
• Countersinking and step-drilling in sheet metal and plate
• Workshop and production drilling with hand-held and machine tools
• Applications on non-ferrous metals such as aluminum and brass

Key specifications

• Material: high-speed steel (HSS)
• Shank/geometry: tapered cutting profile for gradual diameter change
• Diameter: 25.5 mm
• Typical use: metal cutting, countersinking, step-drilling
• Compatibility: suitable for manual and machine drill tools

How to use

Secure the tapered drill bit in a compatible chuck or holder ensuring concentric alignment. Mark the workpiece and use appropriate clamping to prevent movement. Start drilling at low speed to establish the cutting groove, then increase speed within the recommended range for HSS bits while applying steady pressure and coolant or cutting fluid if processing thicker or harder metals. For countersinking or stepped holes, advance the bit gradually along the taper to reach the desired diameter. Withdraw periodically to clear chips and avoid overheating.

Usage recommendations

Use cutting lubricant when working with steel and other hard metals to prolong tool life. Match drill speed and feed to the material type and thickness: lower speeds and steady feed for hard metals, higher speeds for softer non-ferrous materials. Inspect the bit for wear or damage before use and replace if cutting edges are chipped or excessively blunted.