The Somta Extra Long Series Drill - HSS-E Parabolic Flute, 11mm x 455mm, is crafted for serious deep-hole work. Built to reach into thick workpieces and hard metals, this drill balances long reach with precision cutting to deliver reliable holes every time.

Key features that set it apart

• Extra-long reach with a 455mm overall length enables deep-hole drilling in bulky parts, assemblies, and hard-to-reach pockets without repositioning the workpiece.
• HSS-E construction — cobalt-enhanced high-speed steel provides superior heat resistance and extended tool life when drilling tough materials like steel, stainless steel, and cast iron.
• Parabolic flute design optimizes chip evacuation, reducing clogging in long holes and maintaining steady cutting action from start to finish.
• Sharp, durable cutting edges deliver clean, accurate holes with minimal burrs, even in demanding materials and tight tolerances.
• Efficient friction management flute geometry minimizes friction and heat buildup, helping maintain cutter integrity and finish quality over longer runs.

Ideal applications

How this drill improves your workflow

• Cut clean holes with consistent diameter throughout long bores, reducing secondary finishing work.
• Extend tool life in high-heat drilling scenarios thanks to cobalt-enhanced HSS-E properties.
• Minimize downtime with reliable chip evacuation, keeping the drill cool and productive during extended plunges.

Practical tips for best results

• Use a suitable cutting fluid or coolant to control heat and extend bit life on tougher metals.
• Peck drilling in moderate increments to aid chip clearance and reduce binding in deep holes.
• Secure the workpiece firmly and drill at a steady, moderate feed rate to preserve hole accuracy and flute integrity.
• Inspect the cutting edges regularly and replace when you notice dullness or signs of wear to maintain hole quality.

The Somta Extra Long Series Drill - HSS-E Parabolic Flute, 11mm x 455mm, is the go-to choice for engineers, machinists, and fabricators who demand dependable performance when depth and reach matter most.