Somta Long Series Drill - HSS-E Parabolic Flute - 6.7mm

The Somta Long Series Drill - HSS-E Parabolic Flute - 6.7mm is crafted for serious deep-hole tasks, delivering reliable performance when standard bits fall short. Designed to reach beyond surface holes, this drill maintains precise diameters and clean bore finishes even through thick, demanding materials.

Pinned to precision: what sets this drill apart

• HSS-E construction combines high-speed steel with enhanced alloying for superior heat resistance and durability, keeping cutting edges sharper longer under tough drilling conditions.
• Long series length provides extended reach without sacrificing rigidity, making it ideal for through-thickness drilling where standard bits can't reach or maintain accuracy.
• Parabolic flute design optimizes chip evacuation and reduces cutting forces. The wider flute toward the tip clears swarf faster, cooling the bit and preserving hole quality during extended drilling sessions.
• Sharp cutting edges and precise bore deliver clean holes with minimal burrs, even in harder metals, improving assembly fit and reducing secondary finishing work.
• Low-friction flute geometry minimizes heat buildup, helping sustain tool life and maintain hole tolerance across repetitive cycles.

What this drill does for you

• Drills deeply into thick workpieces like structural steel, cast iron, and alloyed metals without frequent tool changes.
• Produces consistent hole sizes and smooth bore finishes essential for precise assemblies, fasteners, or bushings.
• Integrates seamlessly with standard drilling equipment and chucks, offering a straightforward upgrade for workshops that demand resilience and long-term reliability.

Practical usage tips

To maximize performance, pair the 6.7mm Somta Long Series Drill with appropriate drilling speeds and lubrication. Start with a moderate feed, maintain a steady RPM, and allow the parabolic flutes to clear chips between pecks. For thick or hard materials, advance in small increments to prevent binding and heat buildup, then finish with a light pass to refine the bore.

Ideal for professional machinists, fabricators, and workshop setups seeking a dependable deep-hole drill that balances reach, durability, and hole quality in a single tool.