Meet the Dormer Pramet A940 5/16 Inch HSS-E High Performance Multi-Application Straight Shank Long Series Drill, DIN/ANSI ready for precision drilling across a wide range of metals. Built for engineers and machinists who demand reliable starts, clean holes, and deep reach, this drill bit is engineered to elevate everyday metalworking into predictable, repeatable results.

Why this drill stands out

• 130-degree point for self-centering starts and reduced push force, helping you avoid wandering holes and improve first-pass accuracy.
• Bright finish minimizes material build-up on the cutting edge, promoting smoother cuts and less post-drilling cleaning.
• Parabolic flute design enables efficient chip evacuation and enables extra-deep holes in a single pass, increasing productivity on long-reach workpieces.
• Premium HSS-E substrate delivers superior heat resistance and toughness, making it versatile for drilling steel, aluminium, and stainless steel without frequent tool changes.
• Long-series with straight shank provides extended reach and rigid alignment in collets and chucks, ideal for deep pockets, blind holes, and components with tight clearances.
• High-performance drilling geometry supports high speeds and feeds, producing accurate, smooth holes with h10 tolerances for critical applications.
• DIN/ANSI compliant ensures broad compatibility with standard tooling setups, so it fits seamlessly into existing workflows.

Practical use cases

• Automotive and aerospace fabrication where durable, long-reach drilling is needed for structural members and housings.
• Industrial equipment production requiring clean, precise holes in steel, stainless steel, or aluminum components.
• Maintenance and repair work where consistent hole quality and tool life reduce downtime and part rework.

To get the most from the A940, match your speeds and feeds to the material and hole depth. Use a sharp, clean drill, apply light lubrication to minimize built-up edge, and start with a conservative feed rate before increasing to the machine’s optimal range. This approach preserves tool life while delivering consistent hole quality across runs.