Somta Long Series Drill - HSS-E Parabolic Flute - 7.3mm

The Somta Long Series Drill – HSS-E Parabolic Flute – 7.3 mm is purpose-built for deep-hole drilling where reach and reliability matter. This extended-length drill bit penetrates thick workpieces with controlled, precise holes, making it a dependable choice for challenging metalworking tasks.

Why this drill stands out

• HSS-E durability combines high-speed steel with enhanced alloying elements for superior heat resistance and edge retention, so you can push for deeper holes without rapid wear.
• Parabolic flute geometry excels at chip evacuation and reduces cutting forces. The result is smoother cutting action, less heat buildup, and cleaner holes even in tough materials.
• Long-length design delivers extended reach without sacrificing rigidity, enabling deep through-holes and through-hardened workpieces that shorter bits struggle to access.
• Precision cutting edges deliver clean, accurate holes with minimal burrs, helping you meet tight tolerances in a single pass where possible.

What it’s ideal for

• Deep-hole drilling in thick ferrous and non-ferrous metals, including steel, stainless steel, cast iron, and certain aluminum alloys.
• Automotive and aerospace fabrication where long-through-holes are routine and accuracy matters.
• Machining jigs, fixtures, and prototypes that require reliable, repeatable hole depths.
• Maintenance and repairs that involve penetrating thick metal components without frequent tool changes.

How this drill improves your results

• Consistent hole quality thanks to sharp cutting edges and stable flute geometry that maintain geometry at depth.
• Reduced tool wear through efficient chip evacuation and controlled cutting forces, extending tool life in demanding applications.
• Less heat, fewer deflections during deep drilling, which minimizes wandering and improves first-pass success rates.

Practical tips for best results

To maximize performance with the Somta Long Series Drill, pair it with appropriate feeds and speeds for the material you’re drilling, and use cutting fluid or light lubrication to manage heat. Secure the workpiece firmly to prevent deflection, and consider a brief pecking cycle to clear chips when drilling very deep holes. Inspect the flute and point before and after use, and store the bit in a protective case to preserve its sharp edge for the next job.

When you need reliable reach, clean hole quality, and durable performance in deep-hole applications, the Somta Long Series Drill – HSS-E Parabolic Flute – 7.3 mm is built to deliver consistent results project after project.