Meet the Dormer Pramet A976 4.70 mm HSS-E Extra Long Multi-App Straight Shank Drill (DIN 1869 / 1). This deep-hole specialist is engineered to deliver clean, accurate bores in steel, aluminum, and stainless steel with fewer passes and less effort, thanks to a smart combination of geometry, material, and finish.

Why this drill stands out

• 130° self-centering point: The 130-degree point reduces wandering and lowers the push force required to start a hole, helping you achieve immediate centering and straighter bores from the first cut. This is especially valuable when working in tight tolerances or with hardened steels.
• Parabolic flute design for deep holes: A976’s parabolic flute creates generous chip space, enabling deep-hole drilling in a single pass and minimizing chip buildup that can cause stalling or wander. This feature is a hallmark of the high-performance PFX family.
• Bright finish for smoother cuts: The bright, unmarred finish reduces material sticking to the cutting edge, helping you maintain consistent cutting action and reducing the need for frequent cleaning or tool changes.
• Premium HSS-E with 5% cobalt: The cobalt-enhanced HSS-E composition improves heat resistance and edge retention during high-speed drilling, making it well-suited for steel, stainless steel, and other challenging metals.
• Extra-long reach (DIN 1869 / 1): This straight-shank drill is designed for long-reach applications. With an overall length of 185 mm and a cutting length of 125 mm, it’s ideal for deep bores where conventional drills fall short.
• DIN 1869 / 1, Type W, 4.7 mm: Built to the DIN 1869 / 1 specification, ensuring compatibility with common deep-hole drilling standards and equipment. The nominal diameter is 4.70 mm, making it precise for near-exact bore sizing.

Ideal use cases and what you can achieve

Perfect for applications that demand very deep holes without multiple entry/exit cycles. Whether you’re fabricating hydraulic components, automotive housings, or steel structures, the A976 enables deeper bores in a single pass, thanks to the parabolic flute and 15xD drilling capability without pecking in steel. This makes it a reliable choice for shops that prioritize efficiency, reduced tool changes, and consistent hole quality.

Practical tips for best results

• Secure the workpiece and use appropriate clamping to prevent deflection during deep drilling.
• Start at a low to moderate speed with steady, progressive feed to leverage the 130° point’s self-centering action.
• Use coolant or a light oil to improve tool life and chip evacuation in long bores.
• Maintain a straight pecking approach if needed, but rely on the parabolic flute to minimize the need for multiple passes.
• Pair with compatible drill chucks or CNC/hand drills rated for HSS-E, 4.7 mm diameter, and long-reach applications.

Specs at a glance

• Nominal diameter: 4.70 mm
• Total length: 185.0 mm
• Flute length: 125.0 mm
• Shank: Straight, cylindrical
• Cutting material: HSS-E with 5% cobalt
• Coating/finish: Bright
• Angle of point: 130°
• Flute form: Parabolic
• Standard: DIN 1869 / 1
• Applications: Deep-hole drilling in steel, stainless steel, aluminum; up to approximately 15xD without pecking

With the Dormer Pramet A976, you’re choosing a purpose-built solution for deep-hole challenges. It combines a self-centering point, high-heat resistance, and a design that pushes through long bores with fewer interruptions, so you can complete precision holes faster and with greater consistency.