Dormer Pramet A977 11.50 mm HSS-E Extra-Long Drill is engineered for precision, depth, and reliability in demanding metalworking environments. This straight-shank, extra-long drill is designed to reach deep into steel, aluminum, and stainless steels while delivering clean, accurate holes to DIN 1869/2 specifications.

• 130° point for self-centering and lighter push — The 130-degree geometry helps the drill find its spot with less starting resistance, reducing chatter and improving hole accuracy during initial contact.
• Bright finish to minimize built-up edge — A bright finish helps keep the cutting edge clear of material buildup, contributing to smoother cutting action and longer edge life.
• Parabolic flute design for deep holes in one pass — The parabolic flute geometry is optimized for aggressive chip evacuation and sustained cutting in deep drilling applications, enabling deeper holes without pecking.
• Premium HSS-E (5% cobalt) material — This cobalt-enhanced high-speed steel balances hardness and toughness, suitable for steel, aluminum, and stainless steel workpieces.
• Extra-long length for increased reach — With an overall length around 365 mm and a flute length of about 250 mm, this A977 drill is purpose-built for drilling very deep holes and accessing hard-to-reach regions. It’s designed to perform 20×D drilling in steel without the need for frequent pecking.
• DIN 1869/2 compliant and straight shank — Precise dimensional standards ensure compatibility with common drill chucks and holders, making it a dependable choice for professional setups.
• Pack of two — This listing includes two high-performance A977 drills, giving you ready coverage for multi-hole projects or spare capacity in busy workshops.

The A977 series is the go-to solution when deep-hole capability matters as much as cutting speed. Whether you’re fabricating steel frames, drilling through thick plates, or creating precision bores in alloy components, this drill delivers dependable performance with minimal tool adjustment. The parabolic flute design helps you maintain steady chip evacuation and consistent hole geometry, while the HSS-E composition stands up to repeated exposure to tough materials.

Ideal use cases: deep hole drilling in steel and stainless steel components, threading-ready bores in automotive or machinery housings, and long-reach holes in aluminum profiles where conventional short drills fall short.

Pro tips for best results: use adequate coolant or cutting oil when drilling metals to extend edge life; start with a light, consistent feed and increase gradually to prevent deflection; ensure the workpiece is well clamped to preserve hole accuracy and drill stability.