Dormer Pramet A110 6.20 mm HSS ST STRAIGHT SHANK LONG SERIES DRILL DIN 340

The Dormer Pramet A110 6.20 mm HSS straight shank long series drill (DIN 340) is built for serious metalworking where depth, precision, and reliability matter. This drill combines a robust 118° conventional point with a durable high-speed steel composition to deliver clean, accurate holes across a range of materials, from steel and stainless steel to aluminum.

Key features and benefits

• 118° conventional point — a strong, easy-to-regrind tip that bites firmly into the workpiece and helps reduce wandering during start-up, even in tougher alloys.
• Steam oxide finish — minimizes friction and prevents workpiece material from sticking to the cutting edge, promoting smoother entry and reduced built-up edge formation.
• Long length series — designed for drilling deeper holes and accessing recessed or hard-to-reach areas without sacrificing rigidity or accuracy.
• Premium HSS material — versatile performance across a wide material spectrum, including steel, aluminum, and stainless steel, making it a reliable all-rounder in workshops and production lines.
• Straight shank (DIN 340) — compatibility with a broad range of collets and chucks for both hand-held and machine drilling, delivering consistent concentricity and stability.

Why this drill stands out

In practical terms, the A110 6.20 mm drill is a true workhorse for both shop-floor fabricators and hobbyists who frequently encounter deeper holes or denser materials. The combination of a precise 118° point and a long, rigid shank means you can achieve true starts and minimal deflection, even when your setup isn’t perfectly aligned. The steam oxide finish further reduces heat buildup and material adhesion, letting you push through tougher workpieces with less clogging and longer edge life.

Ideal use cases

• Fabrication and automotive work where deep, straight holes are required without frequently re-positioning the drill.
• Machine and hand-held drilling operations in steel, aluminum, or stainless steel where dependable edge retention and smooth chip flow are essential.
• Rework projects or prototype builds where quick re-grinding and reuse of the same drill reduces downtime and cost per hole.

Practical tips for best results

• Use appropriate spindle speed and feed rates for the material being drilled; start with conservative speeds and increase gradually while monitoring chip formation.
• Apply light cutting fluid or coolant for metals to improve edge life and reduce heat buildup, especially in deeper holes.
• Peck drilling can help clear chips in long-hole applications—pause to retract and evacuate chips before continuing.
• Keep the drill sharp; the 118° point regrinds easily, which helps maintain precise hole geometry and reduces wander on initial entry.

Whether you’re outfitting a machine shop or upgrading a DIY workshop, the Dormer Pramet A110 6.20 mm HSS straight shank long series drill delivers dependable performance, deep-hole capability, and broad material compatibility in a single, robust tool.