Meet the Dormer Pramet A977 8.50 mm HSS-E High-Performance Multi-Application Straight Shank Extra Long Series drill (DIN 1869 / 2) — a purpose-built solution for deep, precise holes across a range of materials. Designed for jobs that demand reach without compromise, this drill pairs robust construction with smart geometry to deliver consistent results in demanding environments.

Why this drill stands out

• 130-degree point for self-centering and reduced push force. Start holes cleanly with less wandering and smoother entry, even in tough or uncertain materials.
• Bright finish. A polished edge helps minimize sticking of workpiece material to the cutting edge, enabling smoother drilling and easier chip evacuation.
• Special parabolic flute design. Optimized for drilling very deep holes in a single pass, improving chip removal and reducing snag or clogging in long drilling operations.
• Premium HSS-E material. Engineered for longevity and reliability across a variety of metals, including steel, aluminum, and stainless steel, making it a versatile choice for mixed-material workshops.
• Extra-long length series. Specifically intended for deep-hole applications and reach-limited workpieces, enabling through-holes or long blind holes without swapping tools.
• Straight shank with DIN 1869/2 compatibility. Works with standard chucks and fixtures, simplifying integration into existing setups.
• Multi-application performance. One drill that can handle multiple materials and depths, reducing tool-change frequency and improving workflow efficiency.

Ideal use cases

Engineers and machinists will reach for the Dormer Pramet A977 when you need dependable deep-hole drilling without switching tools. It shines in:

• Automotive component manufacturing where long bores are common.
• Aerospace assemblies requiring precise, deep openings in structural or sheet materials.
• Toolmaking and mold fabrication where deep pockets or channels are standard.
• General machining shops handling mixed metals such as steel, aluminum, and stainless steel in a single job.

Practical tips for best results

• Use appropriate lubrication and coolant to manage heat during deep-hole drilling and to extend tool life.
• Start with a light, steady feed to establish a true center, then increase as the hole deepens to maintain accuracy.
• For very deep holes, consider pecking cycles with controlled Retract/Chip-evacuation to prevent built-up heat and chip packing.
• Pair with a compatible straight shank holder or collet system designed for long-reach drills to maintain rigidity and straightness.

The Dormer Pramet A977 8.50 mm HSS-E High-Performance Multi-Application Straight Shank Extra Long Series drill is the reliable choice when depth, reach, and material versatility matter most. It’s engineered to deliver clean starts, efficient chip evacuation, and consistent hole geometry across a variety of metals, making it a smart addition to precision machining and manufacturing workflows.