Abraboro HSS-G DIN 338 VULCANO drill bit with stepped tip Ø12.5 mm, model AB30012500

Abraboro HSS-G DIN 338 VULCANO drill bit with a stepped tip, nominal diameter 12.5 mm, is a straight-flute twist drill made from high-speed steel to DIN 338 specifications. It is designed for drilling through-holes and precision holes in steel and similar ferrous materials using hand-held drills and drill presses. The stepped cutting tip improves centring and chip evacuation compared with a standard point, while the HSS-G material provides wear resistance and retains hardness at elevated cutting temperatures.

Advantages

The stepped tip allows faster entry and reduces walking on the workpiece, facilitating accurate positioning without the need for a pilot drill. HSS-G construction offers good toughness and heat resistance for general metalworking, and the DIN 338 profile ensures consistent geometry suitable for standard drilling applications. The 12.5 mm nominal diameter is appropriate for common bolt and fastening sizes, providing a reliable hole size for through-bolting and clearance holes.

Suitable for

• Drilling through-holes in mild and medium carbon steel
• Drill press and handheld drill applications where a robust HSS bit is required
• General workshop and maintenance tasks requiring consistent hole diameter

When it may not be suitable

This HSS-G drill bit is not optimized for drilling into hard exotic alloys, hardened steels, or abrasive non-ferrous materials such as cast iron or stainless steels at high feed rates; for those materials specialized cobalt, carbide, or coated bits may be more appropriate. It is also not a ground precision tool for ultra-high tolerance applications where diameter-critical reamers or carbide ground drills would be preferred.

Key specifications

• Material: high-speed steel (HSS-G)
• Standard/geometry: DIN 338 twist drill profile
• Tip type: stepped cutting tip
• Nominal diameter: 12.5 mm
• Typical applications: through-holes and general metal drilling

How to use

Select a suitable cutting speed and feed for the material being drilled; for common steels use moderate speeds and steady feed to avoid overheating. Clamp the workpiece securely and mark the drill position; the stepped tip assists with centring but a centre punch can be used for greater accuracy. Use cutting fluid for metal drilling to improve tool life and chip evacuation. Withdraw the bit occasionally on deeper holes to clear chips and allow cooling.

What to consider before purchase

• Ensure 12.5 mm nominal diameter matches the required clearance or bolt size for your application
• Confirm HSS-G material is suitable for the workpiece material and operating speeds
• Check shank compatibility with your drill chuck or tool holder

Usage recommendations

For best results in steel, use appropriate cutting fluid, maintain steady feed, and avoid excessive speeds. For repeated production drilling consider periodic sharpening or replacement to maintain hole quality and dimension consistency.