Drill bit Abraboro HSS tapered for metal 14 mm, model AB44514000

Drill bit Abraboro HSS tapered for metal 14 mm, model AB44514000 is a conical high-speed steel (HSS) drill designed for progressive drilling and countersinking in steel and non-ferrous metals. The tapered geometry lets you enlarge holes step-by-step with a single tool, combining drilling and chamfering operations. Constructed from HSS for improved wear resistance and heat tolerance, the bit is intended for workshop, maintenance and fabrication applications that require controlled hole sizing and clean metal finishes.

Advantages

The HSS material provides reliable cutting performance and resistance to softening at higher temperatures compared with standard carbon steel bits. The tapered conical shape enables gradual hole enlargement without changing tools, improving process efficiency and reducing setup time. Its geometry produces consistent hole diameters and cleaner edges when countersinking, which helps achieve better fit of fasteners and components. The solid construction supports repeated use in metalworking environments and offers predictable drilling results when used with appropriate speeds and lubrication.

Suitable for

• Drilling and stepwise hole enlargement in steel
• Countersinking and deburring in non-ferrous metals (aluminum, brass)
• Workshop and maintenance tasks requiring progressive hole sizing
• Fabrication and repair operations where a single tool must perform drilling and chamfering

Key specifications

• Material: high-speed steel (HSS)
• Tip type: tapered / conical geometry for stepwise drilling
• Nominal maximum diameter: 14 mm
• Primary use: metal drilling and countersinking
• Recommended for use with cutting fluid when machining steel

How to use

Secure the workpiece and select appropriate clamping to prevent movement. Mount the tapered HSS drill bit in a compatible drill or drill press chuck, making sure the bit is straight and properly tightened. Start drilling at low speed to establish the hole center, then increase speed according to material recommendations for HSS bits. Apply steady, moderate feed pressure and use cutting fluid when working with steel to reduce heat and extend tool life. To achieve the required hole diameter, advance the bit through the workpiece until the desired taper depth is reached; for countersinking, control penetration to form the chamfer size needed for fastener seating.

Recommendations for use

Use appropriate drill speeds for HSS in metal (lower rpm for harder steels), maintain steady feed, and employ cutting fluid to minimize heat. Inspect the bit regularly for wear and replace when cutting edges become rounded to ensure consistent hole quality and safe operation.