Dormer Pramet A976 6.40 mm HSS-E High-Performance Multi-Application Straight Shank Extra Long Series drill is engineered for engineers who need depth, precision, and versatility in a single tool. With a 6.40 mm diameter and DIN 1869 / 1 designation, this drill is built to tackle challenging long-hole work across a range of materials while delivering dependable results in busy production environments. < ul >

130° self-centering point minimizes wandering at the start and reduces the push force required to begin a hole. The result is cleaner starts, faster setup, and more accurate bore alignment—especially in hard-to-reach workpieces where precision matters.

Bright finish helps prevent workpiece material from sticking to the cutting edge, reducing built-up edge and maintaining a smooth cutting action through repeated passes.

Parabolic flute design optimizes chip evacuation for extra-deep holes, enabling drilling in a single long pass. This geometry lowers heat buildup, improves hole quality, and supports consistent tool life when penetrating thick sections or deep cavities.

Premium HSS-E material (high-speed steel with cobalt) delivers outstanding wear resistance and durability across a wide spectrum of materials—from mild and carbon steels to aluminum and stainless steels—helping you maximize productivity without swapping bits.

Extra-long length series with straight shank provides the reach you need for very deep holes and applications with limited access. The straight shank ensures broad compatibility with common collets and drill chucks for reliable, repeatable performance.

DIN 1869 / 1 standard ensures compatibility with standard holders and tooling setups, simplifying tool replacement and workflow continuity in professional shops and production lines.

Whether you’re fabricating engine components, drilling deep into mold bases, or reaching into long bores in aerospace assemblies, this drill is built to maintain accuracy and efficiency where other bits struggle. The combination of an optimized point geometry, deliberate flute design, and extended reach translates to longer service life, fewer tool changes, and cleaner, more reliable holes—without compromising on material versatility. < p >To get the most from the Dormer Pramet A976, pair it with appropriate coolant to extend tool life and maintain consistent chip control. Start with a light touch to establish a true pilot hole, then allow the parabolic flute to do the heavy lifting as you progress deeper into the workpiece. This approach helps ensure precise alignment, stable cutting, and repeatable results across multiple drilling operations. < /p >