Drill bit Abraboro AB30004200 step-point HSS-G Ø4.2 mm DIN 338 for metal drilling

Abraboro AB30004200 step-point HSS-G Ø4.2 mm DIN 338 is a straight shank drill bit designed for metal drilling and general machining tasks. Manufactured from high-speed steel (HSS-G) to DIN 338 tolerances, it features a step-point cutting geometry that improves centering and reduces walking on the workpiece. With a 4.2 mm diameter and a straight shank, the bit is suited for use in both hand-held drills and machine spindles in workshop and industrial environments.

Advantages

The step-point design provides reliable centering without requiring a pilot hole and improves chip evacuation for many metalworking operations. HSS-G material offers good hardness and wear resistance at moderate cutting temperatures, making the bit suitable for a range of ferrous and non-ferrous metals. The straight shank ensures secure clamping in standard drill chucks and supports use in portable and stationary drilling equipment.

Suitable for

• Drilling holes in steel and cast iron
• Drilling aluminium and non-ferrous metals
• General workshop fabrication and maintenance
• Use in portable hand drills and bench or column drills

Key specifications

• Material: high-speed steel (HSS-G)
• Cutting geometry: step-point tip
• Standard: DIN 338
• Shank type: straight shank
• Diameter: 4.2 mm

How to use

Secure the drill bit firmly in the chuck, ensuring correct clamping of the straight shank to minimize runout. Select a rotational speed appropriate for the workpiece material and diameter — moderate speeds for steels, higher speeds for aluminium — and apply steady feed pressure. Use cutting fluid or coolant when drilling ferrous materials to reduce heat and prolong tool life. Back the bit out periodically to clear chips when drilling deeper holes.

Usage recommendations

For best results, pre-center with a punch if working on hard or uneven surfaces. Maintain appropriate cutting speed and lubrication to preserve the HSS-G hardness and avoid overheating; replace the bit when signs of wear or chipping appear to maintain hole quality and operator safety.