The Dormer Pramet A940 15.50 mm HSS-E High Perf Multi-App Straight Shank Long Series Drill (DIN/ANSI) is engineered for serious metalworking tasks where precision, reach, and reliability matter most. With a robust straight shank and a long-series design, this drill delivers consistent performance across a wide range of materials and applications, making it a dependable workhorse in fabrication shops, job sites, and production environments.

• 130-degree point for effortless starts: The precisely ground 130° point helps the drill self-center from the first contact, reducing push force and minimizing wandering. The result is smoother starts, cleaner pilot holes, and less work re-drilling or correcting misaligned holes.
• Bright finish for less sticking and bur buildup: The bright-cut finish resists material adhesion at the cutting edge, which means fewer built-up edges and smoother chip flow—especially important when drilling tough metals where material tends to smear or cling.
• Parabolic flute design for deep-hole capability: The innovative parabolic flute geometry channels chips efficiently and clears them quickly. This enables drilling extra-deep holes in a single pass without sacrificing hole quality, reducing cycle times and increasing productivity.
• Premium HSS-E material for versatile drilling: Built from high-speed steel with cobalt (HSS-E) for enhanced hardness and heat resistance, this drill thrives across a broad material spectrum—steel, aluminum, and stainless steel—while delivering sustained tool life and stable performance under demanding conditions.
• High-performance drilling with tight tolerance: Designed to maintain high-quality, accurate holes even at elevated speeds and feeds. The H10 hole tolerance specification ensures consistency and repeatability, which is crucial for assemblies that demand precise fits and reliable function.
• Long-series, straight shank for rigid, versatile use: The straight shank and extended reach provide solid rigidity in standard tool holders and collets, making it well-suited for through- and blind-hole applications where depth and alignment are critical.
• DIN/ANSI compatibility for broad machine compatibility: Built to standard sizes and interfaces, this drill integrates smoothly with a wide range of milling machines and drilling rigs that follow industry DIN/ANSI norms, simplifying tool selection and replacement.

Who benefits most from the Dormer Pramet A940 drill? shop floor technicians, precision machinists, and fabrication engineers who need reliable drilling performance across multiple materials without swapping tools. It’s ideal for automotive components, heavy equipment housings, machine frames, and any project where deep, accurate holes are essential and setup time matters.

Compared to generic, single-material drills, the A940 brings true multi-material versatility without compromising hole quality. The combination of a self-centering point, anti-stick finish, parabolic flute, and durable HSS-E construction means fewer tool changes, faster cycle times, and more predictable results—especially when running at higher speeds and feeds on modern CNC or manual machines.

Practical tips for optimal results

• Match spindle speed and feed rate to the material: harder metals like stainless steel may benefit from slightly lower speeds with steady feeds to maximize edge life and maintain hole roundness.
• Use proper lubrication or cutting fluid appropriate for the material to help heat management and chip evacuation, preserving edge integrity over longer tool life.
• Ensure your workpiece is securely clamped to prevent deflection during drilling, leveraging the drill’s straight shank for stable alignment.
• Peck drilling in long-depth holes can further improve chip clearance and reduce heat buildup when needed.
• Inspect holes for concentricity and burrs after drilling, and deburr as required to ensure smooth assembly fits.