Dormer Pramet A125 7/64 Inch x 125 mm HSS ST STRAIGHT SHANK EXTRA LONG SERIES DRILL BS 328

Meet the Dormer Pramet A125 7/64" x 125 mm HSS Straight Shank Extra Long Series Drill – a purpose-built long-reach drill bit designed for precision metalworking where depth and control matter. This BS 328-rated bit pairs a robust design with a true straight shank, delivering reliable performance in a range of industrial and workshop settings.

Why this drill stands out

• 118-degree conventional point: A strong, self-centering tip that starts cleanly and remains easy to re-grind, helping you maintain accurate hole starts and consistent diameters over time.
• Steam oxide finish: A friction-reducing surface treatment that minimizes built-up edge and prevents workpiece material from sticking to the cutting edge, improving chip evacuation and reducing heat.
• Extra long length: Specifically chosen for drilling very deep holes or reaching into recessed areas where standard bits can’t reach, without sacrificing rigidity or stability.
• Premium HSS material: Versatile enough for drilling a broad range of metals, including steel, aluminium, and stainless steel, while maintaining toughness and edge retention.
• Straight shank for broad machine compatibility: Designed to fit a wide array of drills and CNC machines, delivering dependable clamping and runout characteristics for precise hole quality.
• BS 328 compliant: Built to meet established standards for high-speed steel drill bits, ensuring consistent performance across tools in professional workshops.

Ideal use cases

• Deep-hole drilling in steel and alloyed metals where access is limited or hole depth exceeds standard bit length.
• Automotive and fabrication shops performing through-holes in chassis components, brackets, and structural members.
• Maintenance and repair work requiring a long-reach bit that maintains accuracy when drilling through thick workpieces.
• CNC milling and manual drilling setups where goal is clean entry, steady feed, and reliable chip clearance.

Practical tips for best results

• Use appropriate coolant or cutting fluid to extend tool life and improve chip evacuation, especially on stainless steels.
• Begin with a light pecking routine to establish the hole and prevent long, continuous cuts that can cause heat buildup.
• Re-sharpen the 118-degree point as needed to maintain precise starts and uniform hole diameters.
• Confirm workholding is secure and the bit is properly supported to counter tool deflection during deep drilling.
• Inspect the shank and flute for wear after challenging cuts; refresh as necessary to preserve accuracy and surface finish.

Engineered for longevity and versatility, this Dormer Pramet A125 drill bit is a reliable choice for serious metalworking tasks where depth, strength, and precision matter. Its combination of a robust HSS core, a re-sharpenable 118-degree point, steam oxide finish, and extra-long reach makes it a standout option for deep drilling across steel, aluminium, and stainless steel in both production and maintenance environments.