The Dormer Pramet A976 4.20 mm HSS-E High-Performance Multi-Application Straight Shank Extra Long Drill is built for metalworking precision and deep-hole versatility. Designed to handle a wide range of materials with a single drill, this tool blends depth, reach, and reliable performance for demanding machining tasks.

Key advantages you’ll feel in every cut

• 130° point geometry promotes clean entry and self-centers the drill, reducing push force and helping you start holes accurately right from the first touch.
• Bright finish minimizes friction and prevents workpiece material from sticking to the cutting edge, supporting smoother chip ejection and longer edge life.
• Parabolic flute design is optimized for extra-deep hole drilling, enabling long, uninterrupted passes in a single operation with efficient chip evacuation.
• Premium HSS-E material delivers robust performance across a variety of metals, including steel, stainless steel, and aluminium, making it a versatile choice for mixed-material workstreams.
• Extra-long length provides extended reach for deep bores, blind holes, and workholding setups where standard drills can’t reach, without sacrificing rigidity or accuracy.
• Straight shank, DIN 1869 compliant design ensures dependable clamping and compatibility with standard drill chucks and holders, keeping setup simple and repeatable.

Ideal uses and practical scenarios

• Automotive and aerospace components requiring deep bores where access is limited and precision is critical.
• Tooling and moldmaking tasks that demand long reach to create precise channels or cooling holes.
• General metal fabrication projects that involve drilling into thicker sections of carbon steel, stainless steel, or aluminium with one drill that can tackle multiple materials.

What sets this drill apart from typical options

• The combination of extra-long length and parabolic flute geometry means you can drill deeper in a single pass while maintaining straightness and control—reducing cycle times and tool wear.
• The HSS-E alloy extends tool life and cutting performance under higher heat, making it a reliable choice for demanding production environments.
• The 130° point design minimizes wandering on start and lowers the required force, which translates into faster setup and higher first-pass hole quality.

Tips for optimum results

• Use appropriate cutting fluid or lubrication to manage heat during deep-hole drilling and to preserve edge geometry.
• Start at a conservative speed to establish the hole, then progress to the recommended RPM range for the material being drilled.
• Keep a steady feed to avoid deflection in the extended reach, and regularly inspect edge condition to preempt dulling.