Dormer Pramet A110 2.50 mm HSS ST STRAIGHT SHANK LONG SERIES DRILL DIN 340

Dormer Pramet A110 2.50 mm HSS ST Straight Shank Long Series Drill DIN 340 is engineered for precise, reliable drilling in demanding metalworking tasks. This compact yet capable drill bit combines a fine 2.50 mm diameter with a long-length design, giving you the reach you need without sacrificing accuracy or rigidity.

• 118° conventional point — creates a strong, self-centering start that bites quickly and accepts re-grinding, extending usable life and maintaining hole quality.
• Steam oxide finish — minimizes adhesion of workpiece material to the cutting edge, promoting smoother cuts and easier chip flow for cleaner holes.
• Long length series — purpose-built for drilling deeper holes and reaching into recessed areas or thick workpieces where standard bits struggle.
• Premium HSS material — versatile enough to drill a broad range of metals, including steel, aluminium, and stainless steel, making it a dependable choice across projects.
• Straight shank design — ensures compatibility with a wide array of hand-held drills and machine spindles, delivering stable, accurate drilling with minimal runout.

This drill bit is ideal for machinists, hobbyists, and professionals who routinely switch between handheld drilling and machine drilling while working on enclosures, brackets, or structural components. The A110 profile provides a balance of strength and reach, enabling you to start cleanly, drill deep, and finish with confidence.

Why this long-series drill stands out

Compared to standard-length bits, the long-series version reduces the need for excessive back-and-forth repositioning in deep cavities, helping you complete projects faster with consistent hole dimensions. The 118° point also means fewer wobble starts and a more reliable first cut, especially in tougher materials.

Practical tips for best results

Use steady feeds and avoid aggressive plunging to protect the cutting edge. For steel and stainless steel, pair the drill with appropriate cutting fluid or coolant to maintain edge integrity and extend life. When drilling deep holes, periodically retract the bit to clear chips and prevent binding, and secure the workpiece to prevent deflection.