Dormer Pramet A125 3/16 Inch x 160 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

When deep holes demand reliability and reach, the Dormer Pramet A125 3/16" x 160 mm HSS Straight Shank Extra Long Drill delivers consistently precise results across a range of materials. Built for professional use, this drill combines a purpose-built geometry with robust construction to handle demanding workloads in metalworking, fabrication, and beyond.

• 118-degree conventional point: A strong, self-centering tip that starts cleanly and minimizes walking. The edge is easy to re-grind, extending the tool’s life between flips and enabling precise hole starts even in tougher workpieces.
• Steam oxide finish: A friction-reducing coating that helps chips evacuate smoothly and reduces material adhesion at the cutting edge, delivering smoother holes and less tool chatter.
• Extra-long length (160 mm overall): Designed for drilling very deep holes or reaching into recessed pockets and fixtures where standard bits struggle to reach—no need for improvised extensions.
• Premium HSS material: High-speed steel construction offers solid performance across a variety of metals, including steel, aluminum, and stainless steel, with dependable heat resistance during extended drilling sessions.
• Straight shank: Compatible with standard drill chucks and collets, delivering stable, true-hole drilling even when reaching deep into workpieces.
• BS 328 specification: Engineered to meet rigorous standards for reliability and consistency in professional environments.

Ideal for shops and jobs where depth, reach, and dependable hole quality matter. Use cases include deep through-holes in steel plate, aluminum extrusions, stainless components, and assemblies where space is limited but precision is non-negotiable. The A125’s geometry minimizes wandering on initial contact, while its re-grindable tip helps you maximize return on investment with careful maintenance.

Practical guidance for best results: start with a steady feed and steady downward pressure to maintain a clean entry, employ light pecking to clear chips on deeper holes, and apply appropriate cutting fluid to extend edge life and improve finish on steel or stainless workpieces. For aluminum, higher speeds with a gentle touch can yield quicker, cleaner holes without overheating. Remember, this is an extra-long drill designed to reach deeper sections without compromising hole accuracy or edge integrity.