Meet the Dormer Pramet A940 9/16 Inch HSS-E High Performance Multi-Application Straight Shank Long Series Drill. Designed for reliability in demanding shop environments, this drill bit is built to handle a wide range of materials with consistent, repeatable results. Its robust construction and thoughtful geometry translate into quicker setups, fewer tool changes, and cleaner holes.

130° point for confident starts and reduced push force

The 130-degree point geometry is optimized to self-center reliably, minimizing wandering at the outset of each cut. That means fewer misaligned holes and a smoother entry, especially when starting on tougher workpieces or in blind pockets. The result is improved hole quality right from the first pass and reduced operator effort during milling or drilling cycles.

Bright finish that beats sticking and galling

Finished for minimal adhesion, the bright coating helps prevent workpiece material from sticking to the cutting edge. This reduces built-up edge and chatter, contributing to straighter holes and more predictable feeds. It’s particularly beneficial when drilling through alloys or surface-h finished components where friction can otherwise slow you down.

Parabolic flute design for deep holes, in one pass

The unique parabolic flute geometry clears chips efficiently and maintains rigidity as the hole depth increases. This enables deeper drilling in a single pass, reducing cycle times and the need for pecking or multiple tools. For fabrication and maintenance tasks that require long hole depths, this design is a practical advantage.

Premium HSS-E material for versatile, durable performance

Made with high-speed steel enhanced (HSS-E), this drill delivers improved wear resistance and durability across a broad material range. It performs consistently when drilling steel, aluminum, and stainless steel, allowing you to use one drill for multiple projects without sacrificing hole quality or tool life.

High-speed, high-accuracy drilling with DIN/ANSI compatibility

Engineered as a long-series, straight-shank drill, it fits standard drills and chucks that follow DIN/ANSI specifications. The design supports high speeds and feeds while maintaining h10 hole tolerance, so you can produce precise, repeatable holes in a variety of materials and thicknesses.

Who benefits most

• Shop technicians and fabricators who need a single drill that handles steel, aluminum, and stainless steel with consistent results.
• Maintenance teams performing routine holes in machine parts, brackets, or housings where accuracy and speed matter.
• Prototype shops and job shops that value versatility and reduced tool-rotation time.

Practical usage tips

• Use appropriate coolant or cutting fluid to maximize tool life and chip evacuation, especially when drilling stainless steel.
• For hard materials, start with a light pilot hole or smaller-diameter drill to establish a clean entry.
• Keep feeds steady and avoid overheating; if the hole depth increases, pause to clear chips and maintain cutting efficiency.
• Match your drill speed to the material and hole depth to preserve the 130° point geometry and flute effectiveness.

Technical snapshot

• Diameter: 9/16 inch
• Material: HSS-E (high-speed steel enhanced)
• Point geometry: 130 degrees
• Flute design: parabolic (deep-hole drilling in a single pass)
• Finish: bright to reduce sticking
• Shank: straight
• Series: long (long drill length for reach)
• Standard compatibility: DIN/ANSI
• Hole tolerance: h10