The Somta Extra Long Series Drill — HSS-E Parabolic Flute, 11.5mm x 280mm, is engineered for deep-hole precision and dependable performance in demanding metalwork. Its extended reach lets you drill farther into workpieces without repositioning, making it ideal for long blind holes, pockets, and hard-to-reach interiors.

Why this drill stands out

• Extra-long reach at 280mm overall length enables deep-hole drilling in components with substantial thickness or complex geometries—fewer tool changes and more productive cycles.
• HSS-E construction delivers enhanced durability and heat resistance, extending tool life when drilling tough materials under high-speed conditions.
• Parabolic flute design optimizes chip evacuation, reducing clogging and ensuring a smoother, more consistent hole from shallow entry to deep exit.
• Sharp cutting edges provide clean, accurate holes with minimal dwell time and reduced wall feathering, improving overall hole quality.
• Low-friction flute geometry minimizes heat buildup and friction, helping to maintain cutting efficiency even on demanding workloads.

Use cases and practical benefits

Designed for deep-hole drilling tasks, this drill excels when you need reliable performance across a range of metalworking applications. Use it for long-through-holes in automotive components, precision fixtures, aerospace-grade assemblies, and any project where reach matters as much as accuracy. The parabolic flute keeps chips moving away from the cutting edge, which translates to steadier feeds, fewer interruptions, and more consistent hole diameters.

Tips for best results

• Start with a light, steady feed and maintain a consistent cutting speed to avoid deflection and maximize hole straightness.
• Use appropriate cutting fluid or coolant to extend tool life and improve surface finish, especially in difficult alloys.
• Peck drilling in short intervals helps clear chips and reduces heat buildup during deep-hole work.
• Inspect the flute and cutting edges after extended use; replace or resharpen as needed to maintain hole quality.