Somta Long Series Drill - HSS-E Parabolic Flute - 5.7mm

Meet the Somta Long Series Drill in the 5.7mm diameter, a purpose-built tool for serious deep-hole drilling tasks. This HSS-E Parabolic Flute drill is engineered to maintain stability and deliver precise holes even when you’re working through thick, hard materials. It’s not simply a drill bit—it’s a high-performance solution for demanding fabrication environments.

• Long-series design for deep work: Optimized length-to-diameter ratio provides reliable reach and rigidity, making through-holes in thick workpieces more controllable and consistent.
• HSS-E construction: The enhanced High-Speed Steel composition delivers durable performance under heat and heavy cutting, extending tool life in tough materials.
• Parabolic flute for efficient chip evacuation: The parabolic geometry channels chips away from the cutting edge, reducing cutting forces and minimizing heat buildup for smoother, cleaner holes.
• Sharp cutting edges: Precise geometry ensures clean hole starts and true diameters, reducing the need for rework and improving part quality.
• Reduced friction, enhanced life: The flute profile minimizes friction during drilling, helping to preserve drill integrity and maintain cutting efficiency over longer sessions.

This drill is ideal for metalworking applications where a reliable, deep-hole solution is essential. Use it for through-holes in steel, stainless steel, and other thick materials where standard short drills struggle with chip evacuation and heat. Its design supports cleaner finishes, fewer snags, and less tool wear in repetitive production runs.

Practical tips for best results

• Operate at appropriate speeds and feeds for the material being drilled, preventing overheating and premature wear.
• Use a coolant or cutting fluid to aid chip evacuation and extend tool life.
• Employ a peck drilling approach to periodically lift chips out of the hole and maintain stable cutting conditions.
• Let the parabolic flute do the work—avoid aggressive plunging and allow the drill to establish a clean entry.