Somta Long Series Drill - HSS-E Parabolic Flute - 4.8mm

The Somta Long Series Drill in HSS-E with a parabolic flute is purpose-built for deep-hole drilling in demanding metalworking environments. With a 4.8mm diameter, it delivers consistently clean, precise holes through thick materials, making it an essential tool for fabricators, machinists, and workshop pros who regularly tackle through-holes or deep pockets.

What makes this drill different

• Extended length for deep holes: The long flute geometry reaches farther into workpieces, minimizing the need for multiple setups and enabling reliable, straight holes in thick stock.
• HSS-E construction: High-Speed Steel Enhanced (HSS-E) offers superior hardness and heat resistance, preserving sharpness and prolonging tool life under tough drilling conditions.
• Parabolic flute design: Efficient chip evacuation reduces cutting forces, lowers heat buildup, and minimizes clogging—so you get smoother drilling and fewer retractions.
• Sharp cutting edges: Precision-ground edges deliver clean entry and exit vias with minimal burrs, even in harder metals.
• Reduced friction and heat: The flute geometry works with the drill’s material, helping maintain stable performance during extended drilling sessions.

Ideal applications

Designed for metalworking tasks where depth and accuracy matter, this 4.8mm Long Series Drill excels in steel, stainless steel, and aluminum workpieces. It’s well-suited for automotive fabrication, chassis and frame drilling, machinery housings, and any project requiring precise deep holes with minimal wander and clean edges.

Practical guidance for best results

• Use appropriate feeds and pecking: A steady, progressive feed helps manage heat during deep-hole operations and preserves hole quality.
• Coolant for longevity: Apply light cutting fluid or coolant to reduce wear and extend tool life, especially in tougher metals.
• Keep the drill true: Secure the workpiece and ensure proper alignment to avoid wandering and achieve consistently perpendicular holes.
• Sharpness matters: Start with a fresh, sharp drill to maximize the benefits of the HSS-E material and the parabolic flute.

Whether you’re upgrading your shop’s deep-hole capability or tackling a demanding fabrication project, the Somta Long Series Drill – HSS-E Parabolic Flute – 4.8mm delivers reliable performance, precise results, and longer tool life when deep drilling is part of the job.