Meet the Dormer Pramet A940 7/16 Inch HSS-E High Performance Multi-Application Straight Shank Long Series Drill (DIN/ANSI). Built for serious production and precise manual drilling alike, this drill combines reliability with versatility to handle a wide range of materials and applications in one dependable tool.

130 degree point for effortless starting and self-centering precision. The sharp point reduces start-up push force, guiding the bit into the workpiece with minimal wandering and ensuring clean, accurate holes from the first click of the feed. This makes it ideal for challenging materials where wavering can derail a project.

Bright finish to minimize material adhesion and prevent workpiece material from sticking to the cutting edge. The polished surface reduces built-up edge and chip welding, enabling smoother drilling, fewer interruptions, and longer cutter life—especially when working with alloys or metals prone to gumming up standard bits.

Parabolic flute design for deep-hole capability that enables drilling extra-deep holes in a single pass. This geometry improves chip evacuation and reduces cutting resistance as you plunge deeper, making it a practical choice for through-holes, pocketing, or features that require long, clean boreholes without re-entry.

Premium HSS-E material for broad material compatibility—designed to resist wear and maintain sharpness across a spectrum of substrates, including steel, aluminum, and stainless steel. The HSS-E composition delivers reliable performance at higher cutting speeds and feeds, helping you maintain hole quality even on tougher workpieces.

Long series, straight shank, DIN/ANSI compliant design provides robust stiffness and compatibility with a wide range of machining centers and drill chucks. The straight shank offers secure grip and repeatable performance, while the long series length supports deeper drilling tasks without sacrificing rigidity.

Why this drill stands out

• One drill, many materials: optimized for steel, aluminum, and stainless steel with consistent hole quality.
• Self-centering 130-degree point reduces pilot wandering and improves first-pass accuracy.
• Parabolic flute geometry supports deep-hole drilling in a single pass, reducing cycle times.
• Bright finish minimizes chip buildup, promoting smoother operation and longer tool life.
• DIN/ANSI straight-shank long-series design for dependable performance in a variety of machines.

Ideal use cases

• Fabrication and assembly work requiring clean, accurate 7/16" holes in steel, aluminum, and stainless components.
• Automotive, aerospace, or mechanical projects where deep drilling in a single pass saves time and reduces tool changes.
• Prototype and production environments that demand consistent hole tolerances (H10 range) at higher speeds and feeds.

Practical tips for best results

• Match cutting speed and feed to the material: prioritize steady feeds to preserve edge life, especially on harder alloys.
• Use proper lubrication or cutting fluid to minimize heat buildup and extend tool life during deep drilling.
• Alignez workholding securely to prevent drift; the 130-degree point helps self-centering, but rigid clamping maximizes precision.
• For deeper holes, rely on the parabolic flute design to maintain chip clearance and reduce burying the flutes.