Dormer Pramet A976 4.10 mm HSS-E Extra Long Drill (DIN 1869 / 1) is a purpose-built holemaking tool designed for deep, precise holes across a range of materials. This extra-long, straight-shank drill combines a robust HSS-E composition with a parabolic flute and a self-centering 130° point to deliver reliable starts and exceptional reach in a single pass.

Key features that set this drill apart:

• 130° point angle promotes self-centering starts and reduces thrust, helping you begin holes cleanly with less effort.
• Bright finish minimizes chip adhesion, keeping the cutting edge clear and extending tool life in demanding materials.
• Parabolic flute design is engineered to drill very deep holes in a single pass by efficiently evacuating chips and reducing cutting resistance.
• Premium HSS-E material (high-speed steel with cobalt) delivers greater heat resistance, enabling reliable drilling into steel, aluminium, and stainless steel without frequent tool changes.
• Extra-long length with straight shank (DIN 1869 / 1) provides extended reach for deep cavities, long blind holes, and applications where conventional drills fall short.

Who benefits most:

• Engineers and technicians working on automotive, aerospace, or machine-tool assemblies that require deep-hole accuracy and extended reach.
• Mold making, fixtures, and fabrication tasks involving long internal holes or pockets with restricted accessibility.
• Anyone needing a dependable, all-purpose drill capable of handling a variety of materials—from common steels to non-ferrous alloys—without swapping tools.

How this drill stands up to everyday use:

• The 4.10 mm diameter is ideal for precision applications where tight tolerances matter.
• The combination of 130° point, parabolic flute, and HSS-E composition yields a balance of centering accuracy, chip evacuation, and heat resistance that generic drills struggle to match.
• The DIN 1869 / 1 straight shank ensures compatibility with standard drill chucks and holders, simplifying integration into existing setups.

Pro tips for optimal results:

• Match cutting speed and feed to the material to sustain edge life and hole quality; lighter feeds for aluminum, controlled feeds for alloys or stainless steel.
• Begin with a light, steady approach using the 130° point to establish alignment before increasing depth.
• Maintain clamping rigidity and minimize runout to preserve hole concentricity, especially in deep-hole jobs.
• Use appropriate lubrication or coolant as needed to manage heat during extended drilling operations.