Dormer Pramet A125 5.50 mm x 250 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

Meet the Dormer Pramet A125 5.50 mm x 250 mm HSS ST Straight Shank Extra Long Series Drill BS 328 — a purpose-built drill bit designed for deep-hole metal work where reach, reliability, and edge life matter most. This is the tool you reach for when standard-length bits fall short and precision can’t be compromised.

• 118° conventional point: delivers a strong initial bite with predictable cutting behavior and is easy to re-grind, minimizing downtime between sharpenings.
• Steam oxide finish: helps prevent workpiece material from sticking to the cutting edge, promoting smoother chip flow and cleaner hole walls.
• Extra long length (250 mm): specifically designed for drilling very deep holes and applications requiring extended reach, such as deep pockets, through-holes in thick stock, or long workpieces.
• Premium HSS material: high-speed steel provides strong wear resistance across a range of metals, including steel, aluminium, and stainless steel, helping the bit stay sharp longer under demanding use.
• Straight shank: compatible with a wide array of drilling machines, from handheld drills to drill presses and CNC units, delivering stable clamping and consistent runout.
• BS 328 specification: built to standard British engineering specs, ensuring reliable interchangeability with compatible tool holders and consistent performance across setups.

This Dormer Pramet drill bit is ideal for professional shops, maintenance settings, and serious hobbyists who routinely encounter deep-hole tasks or need an extra-long reach without changing tools. Its combination of a robust 118° point, anti-adhesion steam oxide finish, and durable HSS core makes it a dependable choice when drilling into steel, aluminium, or stainless steel.