Meet the Dormer Pramet A976 3.70 mm HSS-E High-Performance Multi-Application Straight Shank Extra Long Drill — a purpose-built solution for deep, precise holes in a range of materials. This drill is engineered to deliver reliable performance in demanding setups where reach and accuracy matter, from manufacturing floors to workshop benches.

Why this drill stands out

• 130-degree point provides self-centering action and lowers the push force required. The result is cleaner starts, reduced wander, and more consistent hole placement in difficult-to-centre workpieces.
• Bright finish minimizes material adhesion to the cutting edge, helping to prevent built-up edge and enabling smoother entry, faster hole formation, and better surface finish on the hole walls.
• Parabolic flute design is optimized for drilling very deep holes in a single pass. Efficient chip evacuation and stable drilling reduce the need for frequent retracts, which translates to reduced cycle times and more predictable hole depths.
• Premium HSS-E material (high-speed steel with cobalt) delivers enhanced wear resistance and heat tolerance. This makes the drill versatile across metals like steel, aluminum, and stainless steel, maintaining sharpness longer in tougher materials.
• Extra-long length series provides extended reach for deep cavities, long through-holes, and applications where access is limited. It’s ideal for automotive brackets, hydraulic blocks, electrical enclosures, and aerospace components where depth is non-negotiable.
• Straight shank offers broad compatibility with standard drill chucks and tool handlers, delivering stable accuracy and easy maintenance in busy workshop environments.
• DIN 1869 compliance ensures reliable interchangeability and predictable performance in machines and fixtures designed to DIN standards.

Practical applications and use cases

Use the A976 3.70 mm drill when you need to bore precise, deep holes in mixed-material assemblies without changing tools. It excels in:

• Deep-hole drilling in steel plates and castings where access is limited to a single drop-in pass.
• Long through-holes in aluminum extrusions or stainless components where standard-length drills struggle to reach the desired depth.
• Fabrication and maintenance tasks requiring consistent hole quality, from automotive brackets to enclosure fixtures and hydraulic manifolds.

Tips for best results

• Start with a light, controlled feed and moderate rotational speed to establish a true starting point.
• Use a suitable coolant or cutting fluid to manage heat and extend tool life, especially on stainless steel.
• Peck drilling in longer holes helps break chips and prevents clogging; retract periodically to clear debris.
• Ensure the drill is properly secured in a chuck or toolholding system to maximize straightness and surface finish.

Equip your workshop with the Dormer Pramet A976 3.70 mm HSS-E drill and gain dependable depth, clean starts, and versatile performance across common engineering materials. Whether you’re upgrading a drill index or tackling a deep-hole project for the first time, this drill is built to deliver consistent results with less downtime.