Somta Long Series Drill - HSS-E Parabolic Flute - 8.3mm

The Somta Long Series Drill - HSS-E Parabolic Flute - 8.3mm is purpose-built for deep-hole work where access and precision matter. Its extended length and robust HSS-E composition deliver reliable performance in demanding applications, making it a go-to choice for fabricators and machinists tackling thick materials.

Why this long-series drill stands out

• Long reach for deep holes. With a flute length of 109 mm and an overall length of 165 mm, this drill cuts through thick workpieces where standard drills struggle to reach. The extended form enables true deep-hole capability without sacrificing hole quality.
• Durable HSS-E construction. Built from High-Speed Steel-E, it delivers improved heat resistance and wear performance, so you can drill longer between sharpenings in tough materials.
• Parabolic flute for efficient chip evacuation. The parabolic flute design channels chips away from the cut, reducing cutting forces and friction. That translates to smoother entry, steadier hole diameters, and less heat buildup in demanding tasks.
• Sharp edges for clean holes. Precision-ground cutting edges produce accurate, round holes with minimal burrs, which is essential for fits, alignments, and post-process tolerances.
• Fixed geometry for steady performance. The drill features a 40° helix angle and a 130° point angle with a split-point geometry, designed to start reliably and maintain stable cutting through thick sections.
• Versatile material compatibility. Suitable for steel, stainless steel, cast iron, and non-ferrous materials, making it a versatile addition to any shop’s toolkit when deep-hole drilling is required.

Ideal for engine housings, thick plates, and structural components where through-holes must be drilled accurately without repositioning the workpiece, this long-series drill maintains diameter control and finish across substantial depths. Its parabolic flute geometry reduces friction and heat, extending tool life and enabling more productive cycles in metalworking environments.

Practical tips for best results

• Use a light pecking strategy to evacuate chips effectively—pause briefly to clear material buildup, then resume cutting.
• Apply suitable cutting fluid or cooling as needed to manage heat, especially on stainless steel or cast iron.
• Start with a cautious feed rate to establish a clean entry and prevent WED (tool edge dulling) in hard materials.
• Keep the drill sharp and inspect the flute edges regularly to preserve hole quality over time.

Specification snapshot (diameter 8.3 mm): long-series designation with uncoated HSS-E, 109 mm flute length, 165 mm overall length, shankDiameter 8.3 mm, 40° helix, 130° point, split-point geometry. This combination targets deep-hole drilling where reliability and clean results matter most.

Designed for professionals who demand consistency when drilling through thick steel, stainless, cast iron, or non-ferrous alloys, the Somta Long Series Drill - HSS-E Parabolic Flute - 8.3mm brings proven Parabolic flute advantages into every deep-hole task.