Somta Extra Long Series Drill - HSS-E Parabolic Flute - 5.5mm x 330mm

The Somta Extra Long Series Drill - HSS-E Parabolic Flute - 5.5mm x 330mm is built for deep-hole precision without compromise. When the task demands extended reach, this drill bit delivers clean, accurate holes in thick workpieces, gears, housings, and other demanding metalwork.

Key features that matter in real-world machining

• Extra-long reach: With a 330mm overall length, it reaches deep into complex assemblies and tight cavities where standard drills simply can’t go.
• HSS-E construction: High-Speed Steel Enhanced for superior heat resistance and wear life, helping you maintain consistent hole quality across long drilling sessions.
• Parabolic flute design: Optimized for rapid chip evacuation, this geometry minimizes clogging and reduces chip packing in deep holes, boosting efficiency and reducing dwell time.
• Sharp, reliable cutting edges: Precision-ground edges deliver clean, true holes with minimal deflection, even in tougher metals.
• Low-friction performance: Flute geometry minimizes contact heat and friction, helping extend tool life and lower downtime for tool changes.

Why this drill stands out in the workshop

For shops that regularly perform deep-hole drilling, the Somta Extra Long Series Drill offers a practical blend of reach, durability, and hole quality. Its parabolic flute isn’t just about clearing chips—it’s about maintaining steady performance from first contact to the final depth. This translates to fewer reworks, better surface finishes, and more consistent hole straightness across long drills in thick materials.

Use cases and ideal applications

• Deep-hole through-holes in thick steel plates, castings, and engine components.
• Precision bore operations in automotive, aerospace, and heavy machinery fabrication.
• Fixture and jig work where reaching recessed features is essential.

Practical tips to maximize performance: pair the drill with appropriate speeds and feeds suited to the workpiece material, use coolant or lubrication to manage heat, and employ short pecking cycles to break up long chips without interrupting your workflow. With proper use, this 5.5mm x 330mm drill becomes a dependable workhorse for deep-hole tasks, delivering consistent dimensional accuracy and a clean hole finish every time.