Metal drill bit Abraboro HSS-GS 7.2 mm x 109 mm (pack of 10)

Abraboro HSS-GS twist metal drill bit with a 7.2 mm cutting diameter and 109 mm overall length, supplied as a pack of 10, is designed for machining steel and other ferrous and non-ferrous metals. Manufactured from high-speed steel (HSS-GS), this straight-shank drill bit provides a balance of hardness and toughness for drilling through plates, profiles and components in maintenance, fabrication and general metalworking. The 7.2 mm diameter is suitable for common clearance and pilot hole sizes, while the 109 mm overall length accommodates through-holes and moderate material thicknesses when used in hand drills or drill presses.

Advantages

The HSS-GS material offers improved heat resistance compared with standard carbon-steel bits, enabling higher cutting speeds and longer tool life when drilling metal. The twist geometry provides consistent chip evacuation and stable cutting performance across a range of ferrous and non-ferrous materials. Supplied in a pack of 10, the set ensures ready availability of replacement bits for production, workshop or maintenance tasks and reduces the need for frequent regrinding.

Suitable for

• Drilling through mild steel, stainless steel, aluminum and non-ferrous alloys
• Fabrication and assembly work in workshops and maintenance departments
• Pilot holes and clearance holes for bolts and fasteners
• Use in hand drills and drill presses for general metalworking

Key specifications

• Cutting diameter: 7.2 mm
• Overall length: 109 mm
• Material: high-speed steel (HSS-GS)
• Shank type: straight shank
• Pack quantity: 10 pieces

How to use

Secure the workpiece and select an appropriate drill speed for the material being machined; use slower speeds for harder steels and higher speeds for softer metals like aluminum. Clamp the straight shank firmly in the drill chuck, align the drill bit with the marked centre point, and apply steady, moderate feed pressure. Use cutting fluid or coolant when drilling steel to reduce heat and extend bit life. Withdraw the bit periodically to clear chips when drilling deeper holes.

Usage recommendations

For best results, match drill speed and feed to the workpiece material and maintain adequate lubrication when drilling ferrous metals. Replace worn bits to avoid oversized holes and poor surface finish; resharpen HSS-GS bits if facilities are available and if wear is moderate.