Somta Extra Long Series Drill — HSS-E Parabolic Flute, 10.5 mm x 340 mm is engineered for deep-hole drilling where reach and precision matter. This long-reach drill bit pairs aggressive cutting geometry with premium materials to deliver clean, accurate holes in challenging workpieces.

• Extended reach for deep pockets and internal bores: with a 340 mm overall length, this drill penetrates long workpieces and blind holes that standard bits can’t reach, reducing the need for tooling changes or secondary operations.
• HSS-E construction for durability and heat resistance: high-speed steel with enhanced alloying delivers longer tool life and steadier performance in tough metals, helping you tackle demanding drilling tasks with confidence.
• Parabolic flute design optimizes chip evacuation: the wide, curved flute geometry moves chips out of the hole quickly, minimizes clogging, and maintains cutting efficiency even as depth and feed increase.
• Sharp cutting edges for clean, accurate holes: precision-ground margins ensure true hole alignment and reduced burr formation, supporting tight tolerances in metalworking projects.
• Reduced friction and heat buildup: optimized flute geometry lowers friction during cutting, helping to sustain bit life and maintain hole quality during extended drilling sessions.
• Versatile performance across common metals: well-suited for drilling steels, alloys, cast iron, and non-ferrous materials where a robust, long-reach drill makes the difference.

Use cases include deep-through-holes in automotive components, machinery housings, and fabrication work where access is limited and precision is essential. Ideal for technicians, machinists, and serious DIYers who need a single drill that can reach deep features without compromising hole integrity.

How to get the best results

• Lubricate appropriately and begin at a slow to moderate speed to establish a clean pilot hole before full-depth drilling.
• Maintain steady feeds and avoid aggressive plunging to reduce heat buildup and prolong edge life.
• Use a drill press or milling setup with proper workholding to preserve alignment over long depths.
• Inspect chips for consistency; continuous evacuation is key to maintaining hole quality on deep workpieces.

Specifications at a glance

Diameter: 10.5 mm • Overall length: 340 mm • Material: HSS-E (High-Speed Steel with enhanced alloying) • Flute: Parabolic design for efficient chip removal and cooler cutting

When your project demands reach without compromise, the Somta Extra Long Series Drill delivers dependable performance, precise holes, and long tool life in a single, purpose-built solution.