Engineered for deep-hole excellence, the Somta Extra Long Series Drill in HSS-E with a parabolic flute delivers long-reach reliability for precision metalworking. Measuring 11 mm in diameter and 365 mm in flute length, this drill is built to reach depths where standard bits fall short, making it ideal for thick workpieces and through-holes in dense materials.

• Extended reach without sacrificing rigidity. The extra-long 365 mm flute length lets you drill deep pockets and through-holes in single setups, reducing time spent repositioning or flipping workpieces.
• HSS-E durability for demanding metals. High-Speed Steel with extra alloying elements provides improved heat resistance and longer tool life when drilling steel, stainless, cast iron, and aluminum.
• Parabolic flute for efficient chip evacuation. Optimized flute geometry moves chips upward and out of the hole, minimizes clogging, and supports steady penetration at depth.
• Sharp, precise cutting edges. The ground geometry produces clean, true holes with minimal burr formation and consistent diameters across deep bores.
• Thermal management reduces wear. The parabolic flute design and tight tolerances help reduce friction and heat build-up, extending tool life in continuous drilling applications.

Who benefits most: metal fabricators, machine shops, and maintenance teams that routinely create deep bore holes in thick plates or components with limited access. If you’re replacing shorter bits for deep-hole tasks, this Somta drill offers a practical, long-lasting solution that preserves accuracy and finishes with confidence.

Practical tips for best results: secure your workpiece, use light to moderate feeds, and pair with appropriate cutting fluids to maximize life. Start with a smaller pilot hole if drilling very deep holes to guide the bit and reduce wander. Inspect the flutes after use and clean out chips to maintain performance on subsequent jobs.