Dormer Pramet A125 1/4 Inch x 460 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

Meet the Dormer Pramet A125 1/4 Inch x 460 mm HSS Straight Shank Extra Long Series Drill BS 328—the long-reach workhorse built for deep, precise holes in a range of metals. When you’re tackling tubes, long workpieces, or through holes where clearance is tight, this drill delivers from start to finish.

118° conventional point for confident starts — The A125 features a robust 118-degree point that bites cleanly into the workpiece, reduces wandering, and maintains accuracy on entry. It’s also designed to be easily re-ground, helping you extend the life of your tool without sacrificing hole quality.

Steam oxide finish — A practical finish that helps minimize material sticking to the cutting edge and promotes smoother chip flow. The result is steadier drilling, less clogging, and improved hole quality on a variety of metals.

Extra-long length for deep or hard-to-reach holes — This drill is purpose-built for deep drilling tasks. The extra length provides substantial reach in long bores, skeletal frames, or assemblies where conventional drills can’t quite get there. It’s ideal for applications where extended reach is the difference between a doable job and a completed one.

Premium HSS material — Made from high-speed steel to handle drilling into steel, aluminium, and stainless steel with consistent performance. The material blend balances toughness, wear resistance, and heat tolerance to keep cutting effectively across a range of project types.

BS 328 specification for reliable performance — Built to align with established standards, giving you confidence in compatibility with your existing tooling and machinery setups. The straight shank design ensures secure mounting in common chucks and drilling machines.

Versatile, all-purpose drilling capability — Beyond the obvious use for deep-hole work, this drill excels in any job that demands a sturdy, long-reach twist drill. It’s well-suited for fabrication, maintenance, and general metalworking where you need a dependable, single-drill solution that can tackle multiple materials.

• Diameter: 1/4 inch
• Length: 460 mm
• Material: Premium HSS
• Shank: Straight
• Point: 118 degrees
• Finish: Steam oxide
• Standard: BS 328

Practical tips for best results: clamp the work securely, use proper drill speed and lubrication suitable for the material, and avoid side load to preserve the drill’s edge. For long-hole work, consider starting with a pilot hole to reduce workpiece stress and ensure a clean, accurate bore from start to finish.