The Dormer Pramet A110 16.50 mm HSS ST STRAIGHT SHANK LONG SERIES DRILL DIN 340 is engineered for serious metalworking tasks where reach, precision, and durability matter. This long-series twist drill bit pairs a robust 118° conventional point with a sharpenable edge, delivering fast, confident entry into a wide range of materials while staying easy to regrind when needed.

Why this drill stands out

• 118-degree conventional point — Bite in quickly with a self-centering entry that minimizes wandering. The point remains strong through repeated sharpening, so you can sustain dependable performance hole after hole.
• Steam oxide finish — A smooth, oxide coating reduces material adhesion to the cutting edge, promotes smoother chip flow, and helps resist built-up edge during demanding drilling cycles.
• Long length series — Designed for deeper bores and applications where extra reach is essential. The extended flute length enables you to drill through thicker workpieces or into recessed areas without compromising rigidity along the shank.
• Premium HSS material — High-speed steel offers excellent wear resistance and durability across a broad spectrum of metals, including steel, aluminium, and stainless steel, giving you reliable performance in mixed-tool environments.
• DIN 340 specification — The straight shank adheres to standard DIN 340 dimensions, ensuring compatibility with a wide range of drill chucks and fixtures in both handheld and machine setups.
• Versatility in one bit — Suitable for use in handheld drills or machine tooling, making it a practical choice for workshops, maintenance departments, and production environments that require one drill to handle many tasks.

Ideal use scenarios

• Deep bore drilling in steel plates, fabrications, and structural components where space is limited and a standard-length drill won’t reach.
• Through-holes in automotive, aerospace, or mechanical assemblies where a reliable, long-reach bit reduces the need for extensions or secondary tooling.
• General-purpose drilling in mixed materials (steel, aluminium, stainless) where consistent edge life and predictable hole quality are important.

Practical tips for best results

• Secure the workpiece firmly and use appropriate clamping to prevent deflection, especially when drilling deep holes.
• Start with a light center punch mark to establish a precise entry and minimize walking of the bit.
• Use steady feed and moderate cutting speeds; maintain a consistent cutting action to extend edge life and achieve cleaner holes.
• Apply coolant or lubrication as needed to manage heat, particularly when drilling stainless steel or other heat-sensitive materials.
• Keep the drill sharp; when the edge dulls, regrind the point to restore efficient penetration and hole quality.

For workshops that demand a single, dependable drill for heavy-duty metalworking, the Dormer Pramet A110 16.50 mm HSS ST STRAIGHT SHANK LONG SERIES DRILL DIN 340 delivers depth, durability, and versatility without compromise.