Designed for serious metalworking applications, the Dormer Pramet A940 17/32 Inch HSS-E High Performance Multi-Application Straight Shank Long Series Drill (DIN/ANSI) is built to deliver consistent, high-quality holes across a wide material range. This long-series drill combines a precision ground geometry with a robust material system to meet the demands of professional shops and demanding projects.

Superior features that drive real results

• 130° point delivers confident self-centering and reduces the push force required to start a hole, minimizing wander and helping you hit the exact spot every time.
• Bright finish curbs built-up edge and material sticking to the cutting edge, resulting in cleaner holes and less downtime for chip clearing.
• Special parabolic flute design optimizes chip evacuation and stability, enabling deeper holes in a single pass without sacrificing surface finish or accuracy.
• Premium HSS-E material provides enhanced hot hardness and wear resistance, suitable for drilling a broad spectrum of materials—from steel and stainless to aluminum—while preserving hole quality.
• Long-series, straight-shank configuration ensures reliable seating in standard chucks and collets, ideal for long reach and multi-pass drilling on milling machines and drill presses.
• High-performance drilling supports high speeds and feeds with h10 hole tolerance, delivering precise hole diameters with minimal rework and tight concentricity.
• DIN/ANSI compatibility offers dependable interchangeability with common tooling systems for consistent results in production environments.

Who benefits from the A940 drill

Machinists, contract shops, and manufacturers who routinely drill deep holes through steel, stainless steel, and aluminum will appreciate the A940’s balance of reach, rigidity, and finish. It’s an excellent choice for fabricating automotive components, machinery housings, and structural parts where hole accuracy and depth matter as much as throughput.

Practical use and application tips

• Match speeds and feeds to the workpiece material to maximize tip life and maintain the promised h10 tolerance.
• Let the chip flow do the work—the parabolic flute design shines when chip removal is smooth and continuous, especially on longer holes.
• Use appropriate lubrication or coolant for stainless steel or difficult alloys to preserve edge life and prevent workpiece galling.
• For deep drilling, employ a steady, moderate pecking routine to prevent chip packing and heat buildup without interrupting hole accuracy.