Dormer Pramet A976 3.90 mm HSS-E HIGH PERF MULT-APP STRAIGHT SHANK EXTRA LONG SERIES (1) DRILL DIN 1869 / 1

Meet the Dormer Pramet A976 3.90 mm HSS-E High-Performance Multi-Application Straight Shank Extra Long Drill, DIN 1869. This isn’t just a small-diameter bit—it's a purpose-built solution for accurate, deep-hole drilling across a range of materials, engineered to stay reliable from start to finish of your project.

Why this drill stands out

• 130-degree point for confident self-centering and a smoother start. The geometry reduces the push force required, helping you guide the bit with less effort and fewer wandering starts.
• Bright finish minimizes built-up material on the cutting edge, so you get cleaner starts and less workpiece sticking—especially helpful when working with stainless steel and alloys.
• Parabolic flute design optimizes chip evacuation in deep holes. This feature enables drilling extended depths in a single pass, reducing cycle time and the risk of clogging that plagues standard bits.
• Premium HSS-E material delivers improved toughness and heat resistance, making it suitable for drilling steel, aluminum, and stainless steel with consistent performance and longer tool life.
• Extra-long length in the series provides the reach you need for very deep holes or applications where access is limited, without sacrificing rigidity or stability in the cut.
• Straight shank compatible with a wide range of drill chucks and automatic drilling setups, ensuring reliable grip and repeatable results across jobs.
• DIN 1869 standard alignment guarantees dimensional consistency and interchangeability with common tooling inventories, helping you standardize your deep-hole drilling tasks.

Ideal use cases

• Automotive, aerospace, and general manufacturing environments where deep, precise holes are required in steel, aluminum, or stainless steel.
• Applications demanding long reach: through-holes in thick workpieces, guide holes for components, or fixtures requiring extended-drill access.
• Maintenance and repair tasks where reliability and clean finishes matter, reducing rework and improving component fitment.

How this drill helps you work smarter

• Fewer pecks and steady performance in deep-hole tasks thanks to the parabolic flute, which minimizes chip buildup and withdrawal resistance.
• Faster machining with clean, consistent holes due to the bright finish and precise geometry—less downtime spent adjusting feeds and speeds.
• Versatility across common engineering materials without changing tools, enabling smoother production workflows and inventory simplification.

Practical tips for best results

• Match spindle speed to material type and apply light, steady feeds to maximize tool life for 3.90 mm holes.
• Use appropriate lubrication or cutting fluid to manage heat buildup when drilling stainless steel or high-strength alloys.
• Inspect the flute clearance and edge condition regularly to preserve the precision of deep-hole results.