Somta Extra Long Series Drill - HSS-E Parabolic Flute - 6mm x 330mm

Somta Extra Long Series Drill - HSS-E Parabolic Flute - 6mm x 330mm is your go-to tool for deep-hole drilling where reach and precision matter. Built with HSS‑E (High-Speed Steel‑E), this extra-long drill bit delivers robust durability and excellent heat resistance, enabling multiple holes in tough materials without dulling quickly.

The parabolic flute design stands out, providing efficient chip evacuation even in long bores. That means fewer chip jams, cleaner holes, and less heat buildup that can warp or dull standard bits. The sharp, durable cutting edges bite quickly into metal and other common workpiece materials, offering clean, accurate holes from the first plunge.

Key benefits

• Extra-long 330mm overall length for deep-hole access and extended reach in workpieces of varying thickness.
• HSS-E construction for superior heat resistance and longer tool life under demanding drilling conditions.
• Parabolic flute geometry optimizes chip evacuation, minimizes clogging, and reduces friction-driven heat.
• Precise cutting edges deliver clean holes with minimal wandering, reducing the need for secondary finishing operations.
• Versatile for metal, steel, aluminum, cast iron, and other common machinable materials where deep drilling is required.

Practical applications and scenarios

• Deep bores in thick plates, housings, or fixture blocks where a long reach is essential.
• Prototype builds or production runs needing reliable long-reach drilling to recessed areas.
• Repairs or modifications that require consistent hole depth across multiple parts with limited access.

How to maximize performance

• Secure the workpiece firmly with proper clamping to prevent deflection during deep drilling.
• Use a drill press or CNC milling machine with steady feeds to maintain hole accuracy and prevent wandering.
• Apply coolant or lubricant to reduce heat buildup and extend tool life; consider pecking cycles to clear chips.
• If drilling ferrous materials, start with a small pilot hole to improve starts and reduce walk.