Meet the Dormer Pramet A976 5.50 mm HSS-E High-Performance Multi-Application Straight Shank Extra-Long Drill—an engineered solution for precision drilling where depth and consistency matter. Built to cut cleanly through a range of materials, this drill is optimized for long reach without sacrificing accuracy or edge life.

Why this drill stands out

• 130° point for self-centering and reduced push force — The geometry guides the bit into the workpiece with minimal wandering, delivering true starts and straighter holes with less effort.
• Bright finish — The polished surface helps minimize friction and prevents workpiece material from sticking to the cutting edge, promoting smoother starts and cleaner chips.
• Parabolic flute design — Specifically engineered for drilling very deep holes in a single pass, the flute geometry efficiently evacuates chips and reduces bending stress during extended drilling.
• Premium HSS-E material — A high-performance alloy that combines toughness and heat resistance, enabling reliable drilling across a broad spectrum of materials, including steel, aluminum, and stainless steel.
• Extra-long length series — Designed for very deep holes and applications where extended reach is essential, while maintaining rigidity and accuracy with a straight shank for secure seating in chucks and holders.
• DIN 1869 / 1 specification — Built to standard sizing and performance expectations, ensuring compatibility with common machine tools and fixtures.

Ideal use cases

When you need deep, precise holes in automotive components, machinery housings, mold and die cavities, or aerospace fixtures, the A976 5.50 mm drill delivers reliable results. It’s well-suited for drilling through steel, stainless steel, and lightweight aluminum without frequent re‑drilling or edge deterioration. The combination of a long flute and tough HSS-E core makes it a dependable choice for production runs that demand consistency across multiple workpieces.

Practical tips for best results

• Choose a modest feed rate and maintain stable speed to maximize edge life on tough materials.
• Use light cooling or lubrication to manage heat, especially in deep-hole applications where temperature rise can be significant.
• Let the parabolic flutes perform chip evacuation—avoid aggressive pecking that could clog the flute with material.
• Ensure a secure, concentric chuck setup to preserve the self-centering benefits of the 130° point.

What you get with the Dormer Pramet A976 5.50 mm drill

A high‑precision, long-reach drill that blends a self-centering point, anti‑friction finish, efficient deep-hole flute design, and durable HSS‑E construction into a single tool ready for demanding fabrication environments. It’s the practical choice when accuracy, reach, and material versatility matter most.