Meet the Dormer Pramet A977 10.50 mm HSS-E High Performance Multi-Application Straight Shank Extra Long Drill — a purpose-built solution for deep-hole drilling across a range of materials. This drill combines robust steel, precise geometry, and an extended reach to handle demanding fabrication tasks without swapping tools.

• 130-degree point for self-centering entry — minimizes wandering at the start and reduces push force, delivering cleaner starts and more accurate hole placement even in challenging workpieces.
• Bright finish — engineered to resist built-up edge and reduce material sticking to the cutting edge, improving chip clearance and extending tool life in stainless steel and other tough alloys.
• Parabolic flute design — optimized for drilling very deep holes in a single pass. The flute geometry promotes efficient chip evacuation, reduces heat build-up, and minimizes clogging during extended drilling cycles.
• Premium HSS-E material — high-speed steel with cobalt-enhanced耐 heat resistance, making it suitable for drilling steel, aluminum, and stainless steel with reliable performance and longer service life.
• Extra-long length, straight shank — designed for applications requiring significant reach. The straight shank pairs with common collets and drill chucks for versatile use in deep-pocket, blind-hole, and recessed-area operations.
• DIN 1869 / 2 compliance — built to standard dimensions and tolerances, ensuring compatibility with a wide range of machine tools and holders for consistent results.

This drill is ideal for machinists, fabricators, and technicians who regularly drill deep holes through steel, aluminum, or stainless components. When precision, durability, and reach matter, the Dormer Pramet A977 delivers consistent performance across multi-application tasks—from automotive and aerospace assembly to general manufacturing and repair work.

Practical guidance for best results: set a moderate spindle speed and steady feed to match material hardness, use a suitable cutting fluid to manage heat, and maintain alignment to prevent deflection during deep-hole drilling. The combination of an optimized point, parabolic flute, and cobalt-enhanced HSS ensures dependable results and reduced tool changes in busy production environments.