Reach deeper into your workpiece with the Somta Extra Long Series Drill — HSS-E Parabolic Flute, a purpose-built solution for precision deep-hole drilling. With a 14.5 mm diameter and an impressive 380 mm overall length, this drill is ready to conquer long through-holes and challenging pockets where standard bits fall short.

Why this design stands out in demanding metalworking tasks: the HSS-E construction delivers reliable wear resistance and enduring heat tolerance, helping the tool maintain sharpness through tougher materials and extended use. That means fewer tool changes, consistent hole quality, and longer service life in busy shop environments.

The parabolic flute geometry is more than a gimmick — it dramatically improves chip evacuation at depth. The wider, rolled-heel flute space accommodates chips more effectively, reducing clogging and heat buildup that can compromise hole accuracy and drill life. In practice, you’ll see smoother starts and cleaner holes, even when drilling deep into ferrous metals.

Designed for real-world use, this drill balances precision and reach. Expect crisp starting performance, minimal wandering, and dependable hole geometry thanks to sharp cutting edges and a robust, long-length core. It’s the kind of drill you reach for when a deep hole is non-negotiable and accuracy matters at every millimeter of depth.

Practical guidance for optimal results: use steady feeds and avoid overloading the edge in softer materials; for deep holes, adopt a peck-drilling approach to clear chips and maintain coolant flow where possible. This approach prolongs tool life and helps preserve hole concentricity in longer, deeper holes.

Ideal applications include automotive fabrication, machinery frames, and structural components where long-reach drilling is essential. The Somta Extra Long Series Drill is a dependable choice for shops that routinely require deep, through-holes with consistent quality from the first cut to the last.