Dormer Pramet A125 9.00 mm x 250 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

Meet the Dormer Pramet A125 9.00 mm x 250 mm HSS straight shank drill from the extra-long series. Built for serious metalworking, this drill delivers reliable depth and precision in a single, purpose-driven tool.

Precision-first design for confident starts

The 118° conventional point kicks off holes with a strong, straight bite and minimizes wandering. This makes starting accuracy less commanding of your setup time, especially when you’re drilling deep into tough materials. The point is also easy to re-sharpen, helping you extend tool life and maintain clean, true holes with minimal downtime.

Steam oxide finish for smoother cutting and less sticking

The steam oxide surface reduces built-up edge and material adhesion on the cutting edge, promoting smoother chip flow and reduced friction. That translates to crisper holes, less workpiece material pull-in, and more predictable drilling performance across a range of metals.

Extra-long reach for deep or recessed work

With a 250 mm flute length, this drill is purpose-built for deep-hole applications and projects where reach matters. The straight shank is compatible with a wide array of chucks and collets, giving you dependable rigidity and consistent hole geometry even when you’re drilling at depth or through complex assemblies.

Premium HSS for versatility across materials

Made from high-speed steel, the A125 drill handles steel, aluminium, and stainless steel with confidence. Its robust composition and heat-treating balance deliver reliable performance for diversified projects—from fabrication and maintenance to prototyping and repair work.

Who benefits most

Ideal for machinists, fabrication shops, maintenance teams, and DIY professionals tackling deep-hole drilling tasks. If you regularly drill through metal components, casings, engine blocks, or structural parts and need consistent depth and hole quality, this drill is a practical, long-reach choice.

Tips for optimal results

• Match speeds and feeds to your material: start conservatively on stainless steel and ramp up as needed to avoid workpiece binding.
• Use proper lubrication or cutting fluid to extend tool life and improve hole surfaces.
• Ensure solid workholding to minimize deflection, especially given the extra-long length.
• Peck drilling in deep holes to break chips and maintain clear entry into the material.

Specification snapshot: 9.00 mm diameter, 250 mm flute length, HSS, straight shank, extra-long series, BS 328 standard. A dependable, high-reach drill designed to deliver clean, accurate holes across a range of metals.