Somta Long Series Drill - HSS-E Parabolic Flute - 9.8mm

The Somta Long Series Drill in HSS-E with Parabolic Flute is built for serious deep-hole work. At a precise 9.8 mm diameter, this drill combines a long flute length with robust HSS-E construction to deliver reliable through-holes in thick materials while maintaining dimensional accuracy and smooth hole finishes. The parabolic flute design optimizes chip evacuation and minimizes cutting resistance, helping you punch clean, true holes without frequent bit changes.

What makes this drill unique

• : The extended flute length supports sustained drilling through substantial workpieces, reducing the need to flip parts or switch tools mid-operation.
• HSS-E durability: Enhanced wear resistance and heat tolerance mean longer tool life under demanding cutting conditions, even when materials are tough or demanding.
• Parabolic flute for smart chip evacuation: Efficient removal of chips lowers cutting forces and helps prevent chip packing, which can degrade hole quality and shorten tool life.
• Sharp, precise edges: The cutting geometry delivers clean entry and exit holes with minimal burrs, improving part fit and finishing requirements.
• Friction and heat control: Flute geometry is designed to reduce friction and heat buildup, keeping the tip cooler and maintaining cutting efficiency over time.
• Rigid, long-reach performance: A sturdy shank and optimized geometry maintain stability in through-holes, minimizing deflection and wander even in thicker plates.

Ideal use cases

• Deep-hole drilling in thick steel, stainless steel, cast iron, and harder alloys where standard-length bits struggle.
• Fabrication and automotive applications that require through-holes in structural components, brackets, and frames.
• Prototyping and fixture work where consistent hole quality and tool longevity matter for repeatable results.

Practical tips for best results

• Clamp workpieces securely and use a pilot start to prevent wandering at the drill tip.
• Use appropriate cutting fluid or coolant to manage heat and extend tool life during deeper holes.
• Adopt a conservative feed rate and allow time for chip evacuation, restoring a clear path as you progress your hole depth.
• Peck drilling in stages can help clear chips more effectively and reduce built-up edge formation.
• Match relative spindle speed to material type; slower speeds for tougher metals with steady feeds yield smoother holes and longer tool life.

Choose the Somta Long Series Drill for dependable, precise deep-hole performance in demanding metalworking environments. Its combination of 9.8 mm diameter, long flute geometry, HSS-E toughness, and parabolic flute efficiency makes it a capable choice for professionals who value consistent hole quality and extended tool life.