Drill bit set Abraboro HSS cylindrical for metal 5.5 mm, 10 pcs (AB00010551)

Abraboro HSS cylindrical drill bits for metal, 5.5 mm diameter, set of 10 pieces are designed for general metalworking tasks that require reliable, repeatable holemaking. Manufactured from high-speed steel (HSS), this set delivers the hardness and heat resistance required for drilling both ferrous and non-ferrous metals. The cylindrical shank is compatible with standard drill chucks and bench drills, making the set suitable for workshop and on-site use where multiple identical holes are needed.

Advantages

The high-speed steel construction provides wear resistance and thermal stability for continuous drilling in metal. A consistent 5.5 mm diameter across all ten bits ensures uniform hole size and simplifies tool selection when producing multiple holes. The cylindrical shank fits most chucks and allows for straightforward bit changes. Supplied as a set of ten, the product reduces downtime due to bit wear or breakage and is convenient for maintenance, fabrication, and repetitive drilling operations.

Suitable for

• Drilling holes in mild steel, stainless steel, aluminum and other non-ferrous metals
• Workshop maintenance and repair tasks requiring multiple identical holes
• Fabrication, assembly and small-scale production runs
• Use with handheld drills and bench drill presses equipped with standard chucks

Key specifications

• Material: high-speed steel (HSS)
• Diameter: 5.5 mm
• Shank type: cylindrical shank for standard chucks
• Quantity: 10 pieces
• Intended application: drilling in ferrous and non-ferrous metals

How to use

Select a suitable drilling speed for the material being worked (lower speeds for stainless steel, higher speeds for aluminum). Secure the workpiece and align the drill accurately before starting. Insert the cylindrical shank into a compatible chuck and tighten securely. Use cutting fluid or lubricant when drilling harder metals to improve bit life and chip evacuation. Apply steady pressure and allow the bit to cut; avoid excessive feed that can cause overheating or breakage. After use, clean chips from the flutes and store the bits dry to prevent corrosion.

Usage recommendations

For optimal performance and longer tool life, use appropriate cutting fluid when drilling steels and stainless alloys, maintain correct spindle speed, and replace worn bits promptly. When drilling thin sheets, support the material to prevent deformation and use light feed to reduce burr formation.