Dormer Pramet A110 4.70 mm HSS ST STRAIGHT SHANK LONG SERIES DRILL DIN 340

The Dormer Pramet A110 4.70 mm HSS straight shank long-series drill (DIN 340) is engineered for metalworking tasks that demand both reach and precision. This single, purpose-built drill bit is designed to deliver consistent performance across a range of materials, from smooth aluminum to challenging stainless steel, making it a staple for shops that value reliability and durability in their tooling collection.

Key features that matter in real-world work

• 118-degree conventional point. This robust tip delivers straightforward penetration, excellent centering from the first contact, and remains easy to re-grind, which minimizes downtime and keeps you cutting with a sharp edge between resharpenings.
• Steam oxide finish. A purpose-built surface treatment that reduces built-up edge and prevents workpiece material from sticking to the cutting edge. The result is cleaner holes, smoother chip evacuation, and a steadier cutting action, especially when drilling steels and alloys.
• Long length series. The extended flute length provides increased reach for deeper holes and applications where clearance is limited. It’s the practical choice when you need to thread the workpiece or access recessed areas without sacrificing rigidity.
• Premium HSS material. High-speed steel offers reliable performance across a variety of materials — steel, aluminum, and stainless steel — with strong heat resistance and long service life under typical workshop conditions.
• Versatility in application. Designed for both hand-held and machine drilling, this DIN 340 drill is ready for drills presses, milling setups, or portable drilling during on-site work, delivering consistent results in a wide range of environments.

Designed diameter: 4.70 mm. The A110 designation identifies the drill’s geometry and center-cutting behavior, making it a dependable choice when precision and consistency are essential. Because it’s a straight-shank drill, you’ll experience straightforward tool changes and reliable seating in collets or chucks, reducing runout and delivering straighter, more accurate holes.

Practical use scenarios to consider:

• Deep-hole drilling in steel brackets, frame members, and structural components where standard-length bits fall short of reach.
• Machining aluminum profiles or light alloys where clean entry and exit, minimal burrs, and smooth chip flow are priorities.
• On-site fabrication or repair work where a durable, re-sharpenable point helps maximize uptime without sacrificing performance.
• Workbench drilling with a benchtop drill press or lightweight milling setup, where rigidity and consistent chip evacuation speed up production cycles.

Why this drill stands out in a crowded field:

• The 118-degree point is not just a number — it translates to reliable initial contact, reduced wander, and easier re-sharpening, which translates to lower tooling costs over time.
• The steam oxide finish improves overall hole quality by reducing chip welding and material buildup at the cutting edge, helping you achieve smoother hole walls and steadier feeds.
• The long length design brings practical depth capability without introducing excessive flex, so you can tackle deeper holes with confidence in both manual and machine-driven operations.
• The combination of HSS material and DIN 340 specification ensures compatibility with common machining setups, standard tooling holders, and predictable performance in standard use cases.

Tips to maximize performance and extend life:

• Use steady feeds and moderate speeds appropriate to the material being drilled; avoid excessive force that can dull the tip or cause chatter.
• Apply a light cutting fluid or lubricant when drilling steel or stainless steel to improve heat dissipation and chip flow.
• Peck drilling in deep holes to clear chips and prevent workpiece overheating; withdraw the bit frequently to clean the flutes.
• Keep the tool sharp. The easy re-grindability of the 118-degree point means you can refresh the edge in-house, reducing downtime and improving hole quality.

For shops that demand dependable, versatile drilling performance across metals, the Dormer Pramet A110 4.70 mm HSS straight shank long-series drill is a practical choice. Its long reach, durable cutting edge, and surface-treated edge work together to deliver consistent results in both handheld and machine drilling scenarios, making it a reliable workhorse in any metalworking toolbox.