Drill Bit Abraboro VULCANO HSS-G DIN 338 with Stepped Tip, Ø7.0 mm

Abraboro VULCANO HSS-G DIN 338 drill bit with a stepped tip, nominal diameter 7.0 mm, is a high-speed steel tool intended for general metalworking drilling. The DIN 338 geometry provides a robust, straight-fluted profile suited to through and blind hole drilling, while the stepped cutting edge helps with centring on punched or pierced surfaces and promotes improved chip evacuation. The bit is compatible with handheld and stationary drills and is intended for materials such as mild and alloy steels and similar metallic workpieces.

Advantages

The HSS-G material offers good hardness and heat resistance for general-purpose metal drilling. The DIN 338 geometry delivers a stable drilling action and consistent hole quality. The stepped tip enhances initial centring and reduces walking on pierced surfaces, and the improved chip clearance lowers the risk of clogging during deeper holes. The 7.0 mm diameter provides a common, versatile size for many fastening and machining tasks.

Suitable for

• Drilling through and blind holes in mild and alloy steels
• Use in handheld electric drills and drill presses
• General metal fabrication, assembly, and maintenance tasks
• Applications where improved centring on pierced surfaces is required

When it may not be suitable

This HSS-G drill bit is not intended for prolonged drilling in hardened steels, stainless steels with high work-hardening characteristics, or non-metallic materials such as ceramics and concrete. For very high-speed production drilling or extreme-duty applications, carbide or coated carbide drills may be more appropriate due to superior wear resistance.

Key specifications

• Material: high-speed steel (HSS-G)
• Geometry: DIN 338 straight flute
• Tip: stepped tip for improved centring and chip evacuation
• Nominal diameter: 7.0 mm
• Intended use: drilling in steel and similar metals
• Compatible with: handheld drills and drill presses

How to use

Select appropriate speed and feed for the workpiece material and secure the workpiece to prevent movement. Use cutting fluid when drilling steel to reduce heat and extend tool life. Start drilling with light pressure until the stepped tip establishes a centre, then increase pressure to maintain steady cutting. Clear chips periodically from the flutes during deep holes and retract the bit occasionally to improve chip evacuation and cooling.

What to consider before purchase

• Confirm the 7.0 mm diameter matches your fastener or hole-tolerance requirements
• Assess the base material: HSS-G is suitable for typical steel grades but not ideal for very hard or abrasive materials
• Check drill chuck capacity and shank fit for your handheld or stationary drill

Usage recommendations

Use moderate spindle speeds and steady feed rates appropriate for HSS cutting in steels, apply cutting fluid for longer tool life, and avoid excessive axial force that can cause premature wear or breakage. For repeated production drilling consider measuring tool wear and replacing the bit when hole quality deteriorates.