The Somta Extra Long Series Drill - HSS-E Parabolic Flute, 9mm x 410mm, is built for one purpose: reach deep without compromising accuracy. When a bore extends beyond the reach of standard bits, this drill delivers dependable performance from entrance to exit.

With a substantial 410mm flute length, it pierces deeply into metal blocks, castings, and complex assemblies where conventional drills struggle. The HSS-E construction provides enhanced heat resistance and durability, helping you maintain edge integrity through extended drilling sessions. The result is longer tool life and consistent hole quality, even in demanding materials.

The parabolic flute design actively optimizes chip evacuation, pulling away debris as you cut. This reduces clogging and heat buildup, supporting steady progress and straighter bores in deep-hole applications. Sharp cutting edges ensure clean entry and accurate hole diameters, while the flute geometry minimizes friction to keep cutting pressure manageable.

Who benefits most: machinists, toolmakers, and fabricators tackling deep-hole drilling in steel, cast iron, and similar metals. It’s especially valuable in maintenance workshops and production environments where deep bores are required without swapping to multiple shorter bits.

• Deep reach for long through-holes: 410mm flute length enables access to deep workpieces without repositioning.
• HSS-E durability: superior heat resistance and extended tool life under high-speed drilling.
• Parabolic flute efficiency: enhanced chip evacuation reduces clogging and heat buildup.
• Precision and stability: sharp cutting edges deliver clean, true holes with minimal wandering.
• Thermal management: flute geometry minimizes friction, protecting both bit and workpiece.

Practical tips for best results: clamp the work firmly, choose appropriate machine speed and feed for the material, and use a light cutting fluid to slow wear. Employ short pecks to clear chips in thick sections and retract periodically to prevent chip buildup. When not in use, store the bit safely to preserve its precision edge.