Dormer Pramet A125 17/64 Inch x 460 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

When you’re drilling deep holes in thick or complex workpieces, reach and reliability matter. The Dormer Pramet A125 delivers a true long-reach solution without sacrificing cutting performance or accuracy. With a 17/64 inch diameter and a substantial 460 mm overall length, this drill is purpose-built for applications where standard bits fall short—think long through-holes in steel blocks, heavy-gauge aluminum sections, or engineered components that demand precision from top to bottom.

• 118° conventional point for confident starts and clean entry. The point geometry seats quickly and centers precisely, reducing wandering in the initial stage of the cut and enabling accurate hole location even on challenging materials.
• Steam oxide finish minimizes material welding to the cutting edge, promoting smoother chip flow and reducing built-up edge. This translates to steadier feeds, less glare, and less downtime from edge maintenance.
• Extra long length (460 mm) designed for deep drilling tasks and assemblies where additional reach is non-negotiable. Save time on multi‑step setups by drilling long holes in a single operation.
• Premium HSS material handles a range of metals—from structural steel and stainless steel to aluminum—making it a versatile choice for workshops that work across materials without swapping bits.
• Straight shank ensures compatibility with a broad array of drill chucks and collets, delivering stable runout and predictable performance in manual and CNC machines alike.
• BS 328 designation signals a trusted standard, supporting dependable interchangeability in work environments that rely on established specifications.

Ideal for workshop professionals, machinists, and fabricators who regularly tackle deep-hole tasks or long-pocket drilling, the A125 Extra Long Drill helps you complete jobs faster with fewer tool changes. Use it on machines ranging from benchtop drill presses to CNC mills, maintaining a steady feed and using appropriate cooling/lubrication to extend tool life. For best results, re-sharpen the 118° point when needed and keep cutting edges clean to preserve precision on repeated use.

From routine fabrication to high-precision material removal in thick sections, this drill pairs robust construction with practical, real-world performance. When you need dependable depth, straight shank stability, and a geometry that starts clean and finishes true, the Dormer Pramet A125 is the smart choice.