Dormer Pramet A125 15/64 Inch x 310 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

Introducing the Dormer Pramet A125 15/64 Inch x 310 mm HSS ST Straight Shank Extra Long Series Drill BS 328—a purpose-built drill bit engineered for deep-hole reliability and precise metalworking results.

Key features tailored for professional use:

• 118° conventional point delivers a strong, self-centering entry and is straightforward to re-grind, preserving cutting efficiency through repeated use.
• Steam oxide finish minimizes built-up edge and material sticking at the cutting edge, promoting cleaner holes and easier chip evacuation.
• Extra-long length (310 mm) provides extended reach for drilling deep holes, through thick sections, or pockets with limited access—without sacrificing hole accuracy.
• Premium HSS material stands up to steel, aluminium, stainless steel, and a range of alloys, delivering dependable performance across common machining tasks.
• Straight shank design ensures compatibility with a wide array of chucks and drilling machines, delivering stable cuts and consistent hole alignment.
• BS 328 specification confirms standard tooling compatibility, making it a reliable choice for shop inventories and project pipelines.

This drill bit shines in settings like fabrication shops, automotive maintenance, and metalworking environments where depth and reach matter. Use cases include drilling deep pilot holes before tapping, creating through-holes in thick components, and bypassing obstacles that shorter bits can’t reach—while maintaining clean edge quality and accurate hole geometry.

Performance tips for best results:

• Match speed and feed to the material; for steel, begin with conservative speeds and adjust based on chip formation and finish.
• Apply cutting fluid or lubricant to extend tool life and improve surface finish in harder materials.
• Prefer drill presses for vertical alignment to maximize straightness when using the extra-long reach.
• If necessary, start with a small pilot hole to reduce potential deflection on long reach drilling.