Dormer Pramet A125 1/8 Inch x 250 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

The Dormer Pramet A125 1/8 Inch x 250 mm HSS straight shank extra long drill is built for professionals who demand reach without sacrificing precision. With its robust construction and precise geometry, this drill bit powers through a range of materials while enabling deep-hole work in tight setups.

• 118° conventional point — a strong, self-centering tip that reduces wandering and is easy to re-grind in the field, helping you maintain accuracy job after job.
• Steam oxide finish — engineered to minimize workpiece material from sticking to the cutting edge, boosting efficiency and reducing clean‑up time after drilling.
• Extra long length (250 mm) — specifically designed for drilling very deep holes and for applications where extended reach is required, letting you access hard-to-reach areas without changing tools.
• Premium HSS material — versatile enough to drill a wide range of metals, including steel, aluminium, and stainless steel, while delivering dependable performance in demanding shop environments.
• Straight shank — compatible with a broad spectrum of machines and chucks, providing consistent concentricity and stable cutting performance in both bench and milling setups.
• BS 328 compliance — a trusted specification that aligns with standard drill sizes and dimensional tolerances for reliable interchangeability in professional workflows.

This drill bit is ideal for machinists, fabricators, and hobbyists tackling deep-hole projects, such as ribbed brackets, chassis components, or any workpiece where access is restricted and standard-length bits fall short. The A125 series combines durability with practical length, so you can complete complex drilling tasks in fewer steps.

Practical tips for best results:

• Use a center punch and a slow, steady feed to preserve the 118° point integrity during initial entry.
• Light cutting fluid or lubrication helps prolong tool life and improves hole quality on harder steels.
• For deep holes, drill in short, controlled pecks to clear chips and prevent clogging that can heat the edge.
• Maintain proper clamping and workpiece support to minimize deflection and maintain concentricity throughout the cut.