Dormer Pramet A110 9/16 Inch HSS ST STRAIGHT SHANK LONG SERIES DRILL DIN 340

Introducing the Dormer Pramet A110 9/16" HSS straight shank long-series drill (DIN 340) — a purpose-built bit for deep-hole drilling that combines precision, durability, and universal material compatibility. The 118-degree conventional point creates a strong, self-centering start that’s easy to re-grind as your tooling needs evolve, ensuring consistent hole quality project after project.

The steam oxide finish minimizes sticking and built-up edge, helping chips clear more efficiently and reducing heat buildup during extended cutting sessions. This translates to cleaner holes, smoother operation, and longer tool life when drilling tougher materials like steel and stainless steel, as well as softer metals such as aluminum.

Designed for depth without compromise, the long-series geometry delivers increased reach for deep cavities, thick stock, or densely assembled components. Whether you’re working in a shop or on-site, the straight shank (DIN 340) ensures reliable seating in standard chucks and collets, making it compatible with a wide range of handheld and machine drill setups.

• 118° conventional point for precise starts and easy re-sharpening, reducing wandering and improving hole accuracy.
• Steam oxide finish lowers friction and prevents material from sticking to the cutting edge for smoother drilling cycles.
• Long-series design enables deeper holes and extended reach without sacrificing rigidity.
• Premium HSS material handles drilling across steel, aluminum, and stainless steel with dependable performance.
• DIN 340 straight shank ensures broad compatibility with common chucks and machine or handheld drilling operations.

Ideal use cases include fabrication tasks involving thick plates, structural components, and assemblies where hole depth exceeds standard bit reach. For best results, pair with appropriate feeds and speeds for the material, use light lubrication to maintain edge life, and consider a pilot hole for very deep drilling to facilitate alignment and chip evacuation.

In short, the Dormer Pramet A110 9/16" drill is your go-to long-reach solution that delivers dependable accuracy, versatile material compatibility, and practical re-sharpening that keeps you productive on demanding projects.