Meet the Somta Extra Long Series Drill — HSS-E Parabolic Flute, a purpose-built solution for deep hole drilling where reach and reliability matter most. With an 11.5 mm diameter and an impressive 455 mm overall length, this drill bit is designed to plunge into workpieces that standard bits can’t reach, delivering accurate holes from the very first cut.

Engineered for demanding environments, the HSS-E construction delivers exceptional durability and heat resistance, extending tool life even in tougher metals and alloys. The Parabolic Flute design optimizes chip evacuation, dramatically reducing chip clogging and maintaining steady cutting performance as you drill deeper. This means fewer interruptions, less heat buildup, and cleaner hole quality in a single pass.

• Extra-long reach enables deep bore drilling and access to recessed or hard-to-reach areas without repositioning the workpiece.
• HSS-E durability provides reliable performance under heat and wear, improving longevity in repeated deep-hole applications.
• Parabolic flute for efficient chip evacuation minimizes clogging and reduces friction, helping maintain a consistent feed and accuracy at depth.
• Sharp cutting edges produce clean, true holes with minimal burrs, while flute geometry minimizes heat build-up during extended cuts.
• Consistent hole quality across long drills, reducing the need for secondary operations or reaming.

This drill is an ideal choice for professionals who routinely perform deep-hole work in metal fabrication, mold and toolmaking, automotive components, aerospace hardware, and heavy equipment maintenance. If you’ve ever faced tool changes or compromised hole quality when drilling deep bores, the Somta Extra Long Series Drill changes the workflow by offering one reliable, long-reach solution that stays true from start to finish.

Practical tips to maximize performance:

• Use a steady, controlled feed and consider coolant or cutting fluid to manage heat during extended cuts.
• For very deep holes, employ a peck drilling approach to clear chips and prevent clogging without sacrificing precision.
• Secure the drill properly in a chuck or collet to minimize runout and ensure accurate starts.
• Inspect the cutting edges regularly and seek professional sharpening when necessary to preserve hole quality.

Whether you’re upgrading a shop’s deep-hole capabilities or equipping a precision workshop, the Somta Extra Long Series Drill — HSS-E Parabolic Flute, 11.5 mm x 455 mm — delivers extended reach, dependable performance, and superior hole quality that professionals rely on for challenging metalworking tasks.