Somta Long Series Drill - HSS-E Parabolic Flute - 8.4mm

The Somta Long Series Drill — HSS-E Parabolic Flute — 8.4 mm is a purpose-built solution for deep-hole metalworking. Crafted for thick workpieces, this long-reach drill bit is designed to maintain accuracy and reduce deflection as you drill through substantial material. Built with HSS-E (High-Speed Steel—Enhanced), it combines toughness with heat resistance to handle demanding drilling tasks long into a production shift.

• Parabolic flute design boosts chip evacuation and lightens cutting forces, helping you drill straighter holes with less effort and less heat buildup.
• Long-series geometry provides reliable reach for deep holes, reducing the need for multiple setups or tool changes in a single job.
• 8.4 mm diameter paired with sharp cutting edges delivers clean, precise holes with smooth surfaces and minimal burrs.
• Durable HSS-E construction stands up to tough metals and higher cutting temperatures, extending tool life in demanding environments.
• Efficient flute geometry minimizes friction, helping you achieve consistent hole quality while controlling heat generation during long cuts.

This drill is ideal for metal fabrication, equipment maintenance, and machine-assembly tasks where a reliable, long-reach solution is essential. Use it for drilling through steel plates, thick aluminum sections, or other dense workpieces where depth and accuracy matter. The combination of long reach, robust material, and chip-friendly flute design makes it a dependable choice for precision holes on demanding projects.

Pro tips for best results

• Apply steady feeds and avoid aggressive plunging to prevent deflection; let the tool do the work with controlled, progressive pressure.
• Use a compatible coolant or cutting fluid to dissipate heat and extend tool life, particularly on high-temperature drilling tasks.
• Peck drilling in gentle bursts can clear chips and maintain hole accuracy when piercing through thick sections.
• Inspect the edge after use; a dull edge can increase heat and reduce hole quality, so resharpen or replace as needed.