Somta Long Series Drill - HSS-E Parabolic Flute - 7.9mm

The Somta Long Series Drill - HSS-E Parabolic Flute - 7.9mm is purpose-built for deep-hole drilling where reliability and precision matter most. Its extended length is designed to reach through thick workpieces in a single, clean pass, minimizing tool changes and improving through-hole consistency in challenging jobs.

Crafted from HSS-E (High-Speed Steel with enhanced toughness), this drill carries standout heat resistance and wear endurance. That means you can push productive cutting speeds longer and maintain sharpness under demanding metal-removal tasks, from structural steel to more stubborn alloys. The parabolic flute design dramatically improves chip evacuation, reducing cutting forces and minimizing heat build-up. The result is smoother penetration, less drill wandering, and extended tool life—even when bore depth tests your patience.

Key features that translate into real-world benefits:

• Diameter: 7.9 mm with a long-series reach for deep holes in thick materials
• HSS-E construction to withstand higher temperatures and extended use
• Parabolic flute geometry for efficient chip removal and reduced cutting forces
• Sharp cutting edges and refined flute relief for clean, accurate holes
• Flute design that minimizes friction and heat, helping prevent thermal distortion
• Consistent hole quality across long Depth ranges, ideal for through-holes and precision assemblies

Ideal applications include fabrication and fabrication-grade machining of thick steel sections, automotive subsystems, machinery housings, and any project that requires deep, precise holes with dependable tool life. For best results, balance speed and feed to your material, use light lubrication to support chip clearance, and maintain a steady, controlled feed to let the parabolic flute do its job without bogging down.