Introducing the Dormer Pramet A110 12.50 mm HSS Straight Shank Long Series Drill, a purpose-built tool for deep-hole precision and dependable performance in metalworking. Crafted to DIN 340 standards, this drill bit combines robust geometry with reliable wear resistance to tackle demanding projects with consistency.

Key features that matter in real-world work

• 118-degree conventional point: A strong, self-centering tip that starts easily and tracks true. The geometry is designed for clean holes and is easily re-ground when the edge wears, extending tool life in busy workshops.
• Steam oxide finish: A protective coating that reduces adhesion of workpiece material to the cutting edge, minimizing built-up edge and improving chip flow for smoother drilling and less downtime.
• Long length series: Optimized for deeper holes and applications where extended reach is essential. This long form avoids frequent tool changes when access is restricted or hole depth is critical.
• Premium HSS material: High-speed steel offers a balanced blend of toughness and wear resistance, enabling reliable drilling across a range of materials including steel, aluminium, and stainless steel.
• Straight shank with DIN 340 compatibility
: Designed to fit standard drill chucks and holders, delivering consistent concentricity and stability in both handheld and machine environments.
• Versatile for handheld and machine use: Whether you’re guiding by hand or mounting in a spindle, this drill bit maintains performance across a variety of setups and materials.

Applications and practical use

Perfect for metal fabrication, maintenance, and assembly tasks that demand deeper hole capabilities without swapping tools. Use it for drilling through steel, aluminum, and stainless steel where a reliable, straight-shank long drill is preferred. The A110 diameter supports precise hole sizing in brackets, housings, and mounting plates, and its extended reach helps when workpieces are obstructed or when deep cavities require access from unusual angles.

Why this drill stands out

Compared with shorter or more generic bits, the Dormer Pramet A110 combines a thoughtfully engineered point with a durable oxide finish and a long-length design to reduce rework and tool changes. Its broad material compatibility means fewer tool swaps on mixed-metal projects, saving time and improving workflow efficiency. The DIN 340 straight-shank form factor ensures reliable seating in standard chucks, maintaining alignment and minimizing runout for accurate hole placement.

Tip for best results: maintain steady cutting pressure and use incremental drilling when approaching full depth on tougher materials. For stainless steel, moderate speeds with adequate lubrication help preserve the edge and prolong tool life while keeping chip formation smooth.