Metal Drill Bit Abraboro HSS-R 4.4 mm × 80 mm × 47 mm Abraboro

Solid HSS-R metal drill bit Abraboro with a 4.4 mm cutting diameter, 80 mm overall length and 47 mm working length. This twist drill is made of high-speed steel (HSS-R) and is designed for drilling steel and other ferrous metals. It is intended to produce precise through-holes and withstand routine wear in general metalworking, workshop repairs and construction tasks.

Advantages

The Abraboro HSS-R drill bit combines a hardened high-speed steel composition with a ground twist geometry that supports good cutting performance and resistance to wear. Its specified working length and compact overall size make it suitable for use in bench drills, portable drill drivers and drill presses where standard-length, robust metal-drilling performance is required. The solid construction provides dimensional stability and repeatable hole quality during multiple consecutive operations.

Suitable for

• Drilling through steel plates and sections
• Workshop repair and maintenance tasks
• Construction site metal-fixing and installation work
• General metalworking and fabrication where 4.4 mm holes are required

Key specifications

• Cutting diameter: 4.4 mm
• Overall length: 80 mm
• Working length (flute length): 47 mm
• Material: high-speed steel (HSS-R)
• Drill type: twist drill for ferrous metals

How to use

Clamp the drill bit securely in the chuck of the drill so that the shank is fully supported. Select an appropriate spindle speed for high-speed steel and the thickness of the steel being drilled; use lower speeds for larger diameters and harder materials. Apply steady feed pressure and use cutting fluid or lubricant when drilling ferrous metals to reduce heat and extend tool life. Withdraw the bit occasionally to clear chips from the flutes and prevent clogging during deep or prolonged drilling.

Usage recommendations

For best results, pre-centre or use a pilot hole when accurate hole position is required. Use clean cutting fluid compatible with the material being drilled and inspect the bit for wear before repetitive operations. Replace the drill when cutting edges become blunt or when hole quality degrades.