Abraboro HSS conical drill bit 12.5 mm AB44512500

Abraboro HSS conical drill bit 12.5 mm AB44512500 is a high-speed steel conical cutter designed for drilling, enlarging and chamfering holes in metals and other materials suited to HSS tooling. The 12.5 mm maximum diameter and tapered profile allow progressive hole enlargement and step drilling without changing tools, while the HSS material provides hardness and heat resistance for continuous cutting in workshop, maintenance and metalworking environments. The tool is intended for use in handheld or machine-mounted drill chucks where conical hole shaping or countersinking is required.

Advantages

The HSS construction offers high hardness and good heat resistance under cutting loads, extending tool life compared with standard carbon steel bits. The conical geometry enables smooth progressive cutting and accurate hole enlargement with reduced risk of snagging when compared to abrupt-step tools. Compatibility with common drill chucks and machine spindles ensures straightforward mounting and use in a wide range of workshop and industrial settings.

Suitable for / Use cases

• Progressive hole enlargement in steel and non-ferrous metals
• Step drilling and countersinking operations
• Workshop maintenance and repair tasks
• Metalworking preparation for fasteners and fittings
• Prototyping and small-batch manufacturing where variable hole diameters are needed

Key specifications

• Tool type: conical / tapered drill bit
• Material: high-speed steel (HSS)
• Maximum diameter: 12.5 mm (tapered profile)
• Intended use: drilling, hole enlargement, countersinking
• Compatibility: suitable for handheld drills and machine-mounted chucks

How to use

Secure the conical drill bit in the drill chuck with adequate clamping length and set the drill to a speed appropriate for the workpiece material—lower speeds for hardened steels, higher speeds for softer non-ferrous metals. Begin drilling with light axial pressure, allowing the tapered profile to engage progressively; increase feed steadily until the desired diameter or depth is reached. Withdraw periodically to clear chips and prevent overheating. Use appropriate cutting fluid for steel to improve chip evacuation and reduce tool wear.

Usage recommendations

For best results, match rotational speed and feed to the material hardness and apply cutting fluid when machining steels. Inspect the bit regularly for wear or chipping and replace if the cutting edge is blunt to maintain hole quality. When precise final diameters are required, finish-bore with a dedicated reamer or drill to achieve tighter tolerances.