Drill bit Abraboro HSS conical 12 mm AB44512000 for metal

Abraboro HSS conical drill bit 12 mm AB44512000 is designed for drilling conical and stepped holes in metal. Manufactured from high-speed steel (HSS), the bit combines toughness and heat resistance required for metalworking tasks. Its conical geometry enables gradual diameter transition and controlled material removal, making it suitable for creating countersinks, tapered entries, and stepped bore features in both stainless and mild steels. The tool fits standard hand drills and drill presses and is intended for maintenance, fabrication and workshop use where precise conical holes are required.

Advantages

The HSS material provides wear resistance and thermal stability during repetitive metal drilling operations, extending the service life of the bit. The conical shape allows accurate step drilling and smooth chip evacuation when operated at appropriate speeds. The 12 mm nominal diameter offers a balance between rigidity and accessibility for common workshop tasks, and compatibility with standard chucks makes it simple to mount in hand-held drills or bench drills.

Suitable for

• Creating conical or stepped holes in stainless steel and mild steel
• Countersinking and tapered entry holes for fasteners and fittings
• Maintenance and repair tasks in workshops and production environments
• Fabrication work requiring controlled diameter transitions

Key specifications

• Type: Conical/step drill bit
• Material: High-speed steel (HSS)
• Nominal diameter: 12 mm
• Application: Metal drilling, countersinking, step drilling
• Compatible with: Hand drills and drill presses with suitable chuck

How to use

Secure the workpiece and ensure it is properly clamped to prevent movement. Select a suitable drill speed for the metal type — lower speeds for stainless steel, moderate speeds for mild steel — and apply steady feed pressure to allow the conical flutes to cut progressively. Use cutting fluid or coolant when drilling stainless steel or during extended operations to reduce heat and improve tool life. Retract the bit occasionally to clear chips and maintain consistent cutting performance.

Usage recommendations

Inspect the bit before use for signs of wear or damage and replace if cutting edges are dull. For best results, match drill speed and cutting fluid to the specific metal being worked. Avoid excessive side loading and maintain axial alignment to prevent chipping or breakage of the conical tip.