Dormer Pramet A110 4.25 mm HSS ST STRAIGHT SHANK LONG SERIES DRILL DIN 340

The Dormer Pramet A110 4.25 mm HSS straight shank long series drill (DIN 340) is built for precision work where reach and durability matter. Designed for deep holes and challenging layouts, this drill combines a robust tip with practical longevity, making it a reliable choice for serious metalworking projects.

Key features that boost performance

• 118° conventional point delivers an aggressive starting cut that starts true and stays true, while remaining easy to re-sharpen for extended life.
• Steam oxide finish reduces workpiece material sticking to the cutting edge, promoting cleaner holes and smoother chip flow.
• Long length series provides increased reach for deep holes, pockets, and recessed work where standard drills can’t reach.
• Premium HSS material handles a wide range of metals—from steel and stainless steel to aluminium—while maintaining a sharp, durable edge.
• DIN 340 straight shank ensures broad compatibility with common drill chucks and machine spindles, whether in handheld or benchtop setups.

Ideal use cases

• Deep hole drilling in automotive, fabrication, and maintenance applications where access is limited by geometry.
• Prototyping and small-series production that require exact hole depth without frequent tool changes.
• General metalworking tasks in steel, aluminium, and stainless steel where a reliable, long-reach drill is beneficial.
• Handheld drilling with cordless or corded machines, as well as fixed-machine setups, thanks to its versatile straight shank design.

Practical guidance for best results

To maximize the life and performance of the A110 drill, pair it with appropriate cutting fluid or coolant, especially when drilling steel or stainless steel. Maintain steady, controlled feeds to avoid deflection that can dull the edge, and use a sharp punch or center finder to initiate the hole accurately. When the tip shows signs of wear, re-grind the point to restore the original geometry and re-engage cutting efficiency. For best results on deep holes, ensure proper workholding and alignment to prevent chatter and ensure straight, true holes from start to finish.

Whether you’re outfitting a shop floor, upgrading a handheld drilling toolkit, or equipping a machine shop, the Dormer Pramet A110 4.25 mm drill delivers dependable performance, depth capability, and broad material compatibility in a single, versatile tool.