Drill bit Abraboro VULCANO HSS-G DIN 338 with stepped tip Ø5.5 mm

Abraboro VULCANO HSS-G DIN 338 drill bit with a stepped tip and nominal diameter of 5.5 mm is a twist drill designed for metalworking and general engineering tasks. Made from high-speed steel (HSS-G) and manufactured according to DIN 338 standards, this bit provides the hardness and wear resistance required for drilling through steels and other common engineering materials. The stepped tip improves centring and chip evacuation for more consistent through-holes when used in handheld or machine drills.

Advantages

The HSS-G material offers elevated hardness and thermal resistance compared with ordinary carbon steel drills, extending tool life in repetitive drilling operations. The stepped tip design enhances initial point stability and reduces walking on the workpiece surface, which helps achieve accurate hole placement. Conformance with DIN 338 ensures standardised geometry and cutting angles suitable for a wide range of metal drilling applications.

Suitable for

• Drilling through mild and alloy steels, cast iron and non-ferrous metals
• General engineering and maintenance tasks in workshops
• Use in handheld electric drills and drill presses for through-holes
• Applications requiring repeatable hole positioning and consistent chip formation

When it may not be suitable

This HSS-G drill bit is not optimised for high-performance carbide applications or very hard, heat-treated steels where carbide or coated carbide drills are preferred. It is also not intended for drilling masonry, concrete, glass or ceramic materials, which require purpose-built masonry or glass/ceramic bits.

Key specifications

• Material: High-speed steel (HSS-G)
• Standard: DIN 338 (twist drill geometry)
• Tip type: Stepped/stepped cutting tip for improved centring
• Nominal diameter: 5.5 mm
• Typical applications: Metal drilling, through-holes

How to use

Clamp the drill bit securely in the chuck of a handheld drill or drill press with minimal runout. Mark the drilling point and, if necessary, use a centre punch to prevent walking. Use appropriate cutting speed and feed for HSS in the material being drilled; apply cutting fluid when drilling steels to reduce heat and improve chip evacuation. Back off periodically on deep holes to clear chips. After use, clean the flute and store the bit in a protective holder to avoid damage.

What to consider before purchase

• Confirm the 5.5 mm diameter matches required hole size and tolerance needs
• Verify HSS-G is suitable for the specific material and production volume
• Check drill holder and chuck capacity for secure clamping of the bit
• Consider cutting fluid and appropriate speeds for the workpiece material

Usage recommendations

For best results when drilling metals, use moderate speeds for HSS-G, keep consistent feed, and apply cutting fluid. For repeatability, use a drill press or jig and replace the bit when wear degrades hole quality.