Dormer Pramet A110 6.25 mm HSS ST STRAIGHT SHANK LONG SERIES DRILL DIN 340

Meet the Dormer Pramet A110 6.25 mm HSS straight shank long series drill, DIN 340—the reliable workhorse you reach for when depth and precision matter. Built for metalworking with versatility in mind, this drill bit mixes robust construction with practical design to handle a broad range of materials and applications.

Why this drill stands out

• 118-degree conventional point — a strong, self-centering tip that starts cleanly and stays true, making stubborn holes easier to initiate and reducing wandering. The point is easy to re-grind, extending the life of the tool and keeping setup simple.
• Steam oxide finish — a durable coating that minimizes friction and helps prevent workpiece material from sticking to the cutting edge, which translates to smoother chip evacuation and less work stoppage during drilling.
• Long length series — designed for deeper holes and applications where extra reach is required. When you need a drill that can access recessed or hard-to-reach areas without compromising hole quality, this is the choice.
• Premium HSS material — high-speed steel delivers dependable performance across a variety of common metals, including steel, aluminum, and stainless steel. Whether you’re profiling, deburring, or penetrating tougher alloys, you’ll get consistent results.
• Straight shank — compatible with a wide range of drill chucks and machines, providing secure grip and minimal runout for precision drilling in both hand-held and machine setups.
• DIN 340 specification — built to standard dimensions, ensuring predictable interchangeability with compatible holders, bits, and accessories in professional workshops.

This drill is ideal for workshops and fabrication environments where you need to drill clean, accurate holes through various metals. Use it for:

• Creating through-holes and deep blind holes in steel, aluminum, and stainless steel with minimal wander and reliable hole diameter.
• Prototyping and assembly work where precise hole depth and uniformity matter for fasteners and fittings.
• Hand-held drilling with lightweight portability or machine drilling on milling machines and drill presses, thanks to its straight shank design.

How it solves common challenges

• Chipping and built-up edge are reduced by the steam oxide finish, helping you maintain smooth cutting action and prolong drill life.
• The long length reduces the need for supplementary extensions or multiple bits when you’re working on recessed features or long through-holes.
• The robust HSS core provides reliable performance across multiple materials, so you don’t need to switch bits for minor material changes—saving time and increasing throughput.

Practical tips for best results

• Match your speed and feed to the material: use moderate rpm for steel and slower feeds when working through stainless steel to maintain edge integrity.
• Keep the bit lubricated or use cutting fluid on harder materials to optimize chip formation and extend tool life.
• Approach the hole with a light, steady touch to establish a precise starting point, then increase feed gradually to maintain a clean hole diameter.
• When drilling deep holes, consider pecking cycles to clear chips and prevent chip welding, especially in longer drills.

Designed for professionals who demand reliability, repeatability, and long-term value from a drill bit, the Dormer Pramet A110 6.25 mm HSS straight shank long series drill delivers consistent performance across a range of common metals. Whether you’re outfitting a busy workshop or refining a precision fabrication process, this DIN 340 drill brings depth, control, and dependability to every hole you create.