Dormer Pramet A125 7.50 mm x 310 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

The Dormer Pramet A125 7.50 mm x 310 mm HSS straight shank drill is engineered for deep-hole work where reach and precision matter. Its 118° conventional point delivers a strong, self-centering tip that starts cleanly and remains easy to re-sharpen when worn.

• Long reach, compact performance — with a 310 mm flute length, this drill is designed to bore deep holes and access recessed features in large workpieces, reducing the need for multiple tools or extensions.
• 118-degree point — provides aggressive cutting action with stable entry, minimizing wandering and giving you precise hole starts in a variety of materials.
• Steam oxide finish — creates a smoother friction surface that helps chips evacuate and minimizes material from sticking to the cutting edge for cleaner cuts.
• Premium HSS material — versatile enough to handle drilling steel, aluminum, stainless steel, and other common metals, delivering reliable performance and longer tool life when used with proper lubrication.
• BS 328 specification — built to consistent sizing standards, ensuring dependable compatibility with common chucks and tooling setups.
• Versatile, all-around performer — suitable for a wide range of applications in benchtop machines, drilling centers, and CNC mills where deep holes and reach are required.

Practical usage insights:

• Use cutting oil or coolant to maximize tool life and improve surface finish, especially when working with steel or stainless steel.
• Choose spindle speed and feed rate appropriate to the material: higher speeds with steady feeds for softer metals; lower speeds with careful feeds for harder alloys to reduce wear.
• Keep the tip sharp and re-sharpen as needed to maintain clean hole geometry and extend final tool life.