Dormer Pramet A110 0.50 mm HSS ST STRAIGHT SHANK LONG SERIES DRILL DIN 340

The Dormer Pramet A110 0.50 mm HSS ST Straight Shank Long Series Drill DIN 340 is built for precision micro-drilling where every hole must be clean, centered, and repeatable. Designed for small-diameter work, this drill delivers dependable performance in a range of materials, with a geometry that favors accuracy and long-term usefulness in both hand-held and machine setups.

Key features that matter in real-world work

• 118 degree conventional point — a robust tip that starts cuts with minimal wandering and center-punching. The point is easy to re-sharpen, helping you extend tool life without sacrificing precision.
• Long length series — optimized for drilling deeper holes or reaching into tight layouts where standard length bits can’t reach. This extended reach is especially valuable in assemblies with recessed components or when working on stacked materials.
• Premium HSS (high-speed steel) material — engineered for durability and versatile performance across a variety of metals, including steel, aluminium, and stainless steel. The HSS core combines hardness with toughness for reliable drilling under typical shop conditions.
• Straight shank, DIN 340 standard — designed for fast, secure clamping in a wide range of drilling machines, collets, and chucks. The straight shank delivers consistent grip and predictable runout, which is essential for precise micro-drilling at these diameters.
• Versatile application — suitable for both handheld operation and machine-driven drilling, enabling precise work in labs, workshops, and production lines without changing tools for different setups.

Use cases and real-world scenarios

• Micro-machining electronics enclosures, cabinetry hardware, and precision housings where tiny, exact holes are required.
• Prototyping and model-making that demand clean perforations through thin to moderately thick metals and alloys.
• Maintenance and repair work where accessibility is limited and a long-reach drill is needed to reach deep fasteners or internal features.
• Toolmaking and fabrication tasks that require a stable, easy-to-sharpen point to maintain tight tolerances over multiple jobs.

Why this drill matters in your toolkit

• Its 118° point reduces walking and walking-drift on entry, helping you produce consistently centered holes that require less deburring post-drilling.
• The long-series design minimizes the need for successive steps or drilling in multiple passes, saving time on deep-hole work and enabling smoother workflows.
• HSS construction delivers a practical balance of hardness and toughness, allowing reliable drilling across standard engineering metals without frequent tool changes.
• The DIN 340 specification ensures compatibility with a broad ecosystem of tools and components, simplifying maintenance and inventory management.

Practical tips for optimum performance

• Use appropriate cutting speeds and feeds for the material being drilled; slower speeds and steady feeds help extend edge life on micro-diameter HSS bits.
• Keep the drill sharp and re-sharpen promptly when you notice signs of dulling or a rough hole finish.
• Use light lubrication or cutting fluid for metals to reduce heat buildup and prolong bit life, especially on stainless steel and harder alloys.
• Secure your workpiece firmly and ensure proper alignment to maximize accuracy with the long-reach geometry.

Note: The images show the product in a single, consistent design from multiple angles to illustrate the tool’s form and application. This description focuses on the A110 0.50 mm HSS ST Straight Shank Long Series Drill DIN 340 as a precise, durable micro-drill designed for repeatable, high-quality results.