Somta Long Series Drill - HSS-E Parabolic Flute - 8.7mm

The Somta Long Series Drill - HSS-E Parabolic Flute - 8.7mm is engineered for deep-hole reliability in demanding metalworking tasks. Built around a long length, this drill bit reaches through thick workpieces with precision and minimal wandering, streamlining setups and delivering consistent hole quality from start to finish.

Why this drill matters for deep-hole work

When you’re drilling through heavy sections, you need a tool that maintains rigidity while efficiently evacuating chips. The Somta Long Series Drill combines an HSS-E (High-Speed Steel enhanced) substrate with a smart parabolic flute geometry to tackle deep holes where standard bits struggle. Expect dependable performance even at higher speeds, thanks to superior heat resistance and robust wear resistance that extend tool life in tough materials.

Key features that drive real results

• 8.7 mm diameter with a long-series design for extended reach and straight, true holes through thick workpieces.
• HSS-E construction delivers excellent durability and heat tolerance, enabling longer cuts between re-sharpening and reducing the risk of workpiece pulling or edge deformation.
• Parabolic flute geometry optimizes chip evacuation, lowers cutting forces, and minimizes friction inside the hole, helping to prevent clogging and overheating.
• Sharp cutting edges produce clean, accurate holes with minimal burrs, even in challenging materials, while maintaining a reliable chip-flow path.
• Efficient heat management and reduced tool wear due to streamlined flute design translate to longer tool life and fewer tool changes on long drilling cycles.

Ideal applications and scenarios

This drill is purpose-built for machinists, fabricators, and toolmakers who regularly perform deep-hole drilling in metal. It excels when drilling through:

• Thick steel plates, castings, and structural components
• High-strength alloys where heat buildup can degrade edge life
• Fabrication and repair work requiring precise, through-hole alignment

Practical tips for maximum performance

To maximize hole quality and tool life with the Somta Long Series Drill:

• Maintain a steady, controlled feed to leverage the flute geometry for optimal chip evacuation.
• Use appropriate cooling or cutting fluid to manage heat during extended drilling passes.
• Start with a precise center mark to prevent wandering before contact with the workpiece.
• Deburr edges after drilling for a clean finish and to preserve dimensional accuracy in critical holes.

Designed for reliability, precision, and longevity, the Somta Long Series Drill - HSS-E Parabolic Flute - 8.7mm is the go-to choice when deep-hole accuracy matters. It delivers consistent hole geometry, reduces wear on demanding jobs, and helps you keep production running smoothly without frequent tool changes.