Dormer Pramet A125 5/16 Inch x 200 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

Meet the Dormer Pramet A125 5/16 in x 200 mm HSS Extra Long Drill—the long-reach solution engineered for serious hole-making in thicker metals and hard-to-reach workpieces. Built for reliability in demanding setups, this drill delivers consistent starts and precise holes, even when access is limited.

• 118° conventional point for a strong, self-centering start and ease of re-sharpening when required.
• Extra long length with a 200 mm overall length and a 150 mm flute length, designed for drilling very deep holes and applications where reach is critical. Depth capability specified as 10xD in steel.
• Steam oxide finish (oxide finish) formulated to reduce sticking and improve edge life during extended drilling tasks.
• Premium HSS material offering versatile performance across a broad range of metals, including steel, stainless steel, aluminum and more. This drill is suitable for a variety of machining scenarios from fabrication to repair work.
• Straight shank design for compatibility with standard drill chucks and a wide range of machines, ensuring solid grip and minimal runout in everyday shop use.
• BS 328 compliant extra-long drill specification provides standardized interchangeability and reliability for professionals who rely on consistent tooling specs.
• Material range tailored for drilling through steel, stainless steel, cast iron and non-ferrous materials, making it a versatile choice for workshops handling mixed-material projects.

Ideal for engineering, fabrication shops, and maintenance environments where deep-hole access is a reality, the A125 series excels at long-reach drilling without sacrificing durability. Its 5/16 inch diameter balances robust metal removal with precision, while the 200 mm length and 150 mm flute ensure you can tackle through-holes and recessed features without repositioning the workpiece. If you’re working with thicker stock or intricate assemblies, this drill helps you complete tasks in fewer passes, reducing setup time and increasing throughput.

In practical terms, you’ll appreciate how the A125 fits seamlessly into standard drilling workflows: you get dependable point geometry for clean starts, a finish that minimizes chip adhesion, and a reliable steel-to-steel performance that stands up to repeated use in production environments. Say goodbye to frequent tool changes when deep holes are on the agenda—this extra-long drill is built to keep pace with busy days and precise results.