Introducing the Somta Extra Long Series Drill - HSS-E Parabolic Flute - 15.5mm x 400mm. This deep-hole drilling solution is built for machinists who need extended reach without sacrificing hole quality. The impressive 400 mm flute length provides uninterrupted access to deep cavities, pockets, and through-holes across a range of metal workpieces.

Engineered with HSS-E (High-Speed Steel Enhanced) for outstanding wear resistance and heat tolerance, this drill bit maintains a sharp edge through demanding deep-hole cycles, delivering reliable performance across multiple passes. The parabolic flute design optimizes chip evacuation, dramatically reducing chip clogging and heat buildup that can dull edges or affect bore quality.

Key benefits you’ll notice in practice:

• Extended reach: 400 mm flute length lets you bore deeper in engines, molds, and automotive components without repositioning the workpiece.
• Clean, accurate holes: sharp cutting edges and controlled geometry yield tight tolerances and smooth bore finishes.
• Efficient chip evacuation: parabolic flute channels chips away from the cutting edge for consistent cutting action and less clogging.
• Longevity in tough metals: HSS-E combines toughness and heat resistance to extend tool life in demanding drilling cycles.
• Consistent performance: designed to maintain stable cutting action and minimal deflection when drilling long holes.

Ideal for professional machinists, toolmakers, and fabricators who regularly require deep bore access in steel, cast iron, and other metallic workpieces. If your jobs involve deep pockets, long channels, or through-holes that demand precision and reliability, this drill is the go-to choice for dependable results.

Tip for best results: couple the Somta extra-long drill with proper fixturing, apply a steady feed, and use light coolant to manage heat during deep-hole drilling. Start with conservative speeds and adjust according to material hardness and chip evacuation performance.