Core Drill Bit Abraboro HSS-G 3.5–20.5 mm, 63 mm cutting length

Abraboro HSS-G core drill bit 3.5–20.5 mm with a 63 mm cutting length is a variable-diameter reamer designed for precision hole enlarging and finishing in metalworking. Made from HSS-G high-speed steel, this tool is intended for use in drill presses and machines that accept HSS-G tooling. The stepped geometry covers a range of diameters in a single tool, reducing tool changes when progressively enlarging holes and enabling consistent bore alignment and surface quality.

Advantages

The Abraboro core drill bit offers the hardness and wear resistance of HSS-G for reliable cutting performance across a broad diameter range. Its stepped design provides smooth diameter transitions and helps maintain concentricity during progressive drilling or reaming operations. The 63 mm cutting length gives sufficient engagement for through or partial through holes in standard workpieces, while compatibility with common drill press setups ensures straightforward integration into existing metalworking workflows.

Suitable for

• Progressive hole enlarging and reaming in steel and non-ferrous metals
• Use on drill presses and machine tools accepting HSS-G cutting tools
• Repairing or resizing existing bores where controlled diameter increments are needed
• Applications requiring maintained concentricity across multiple diameters

Key specifications

• Diameter range: 3.5 mm to 20.5 mm (stepped core design)
• Cutting length: 63 mm
• Material: HSS-G (high-speed steel)
• Intended use: metalworking hole enlarging and reaming
• Suitable for use in drill presses and compatible machine tools

How to use

Mount the Abraboro HSS-G core drill bit securely in the chuck or tool holder of a drill press or compatible machine. Align the workpiece and set appropriate spindle speed for the workpiece material and HSS-G tooling. Apply steady feed pressure and use cutting fluid where recommended for the material to extend tool life and improve surface finish. Progress through the stepped diameters as required, withdrawing periodically to clear chips and to inspect the bore. Ensure proper clamping of the workpiece to maintain concentricity and safety.

Usage recommendations

For best results with the Abraboro core drill bit, select speeds and feeds appropriate to the material being machined, employ suitable cutting fluid for heat dissipation and chip evacuation, and verify machine alignment before progressive stepping. Regular inspection of cutting edges will help determine reconditioning or replacement intervals to maintain precise bore diameters and surface quality.