The Somta Extra Long Series Drill - HSS-E Parabolic Flute - 10.5mm x 430mm is engineered for deep-hole drilling where precision meets reach. This long-reach drill is built to tackle thick workpieces and recessed features without sacrificing hole quality or straightness.

Crafted for demanding metalworking environments, the HSS-E composition delivers impressive wear resistance and heat handling, ensuring longer tool life even under extended cutting sessions. The parabolic flute geometry shines where standard drills struggle: it actively guides chips away from the cutting edge, minimizes clogging, and reduces heat buildup—helping you maintain clean, accurate holes from start to finish.

Why this drill stands out

• Extra-long reach at 430mm overall length lets you drill deep holes in thick blocks, engine housings, and structural parts without repositioning or re-clamping.
• Parabolic flute for efficient chip evacuation prevents chip packing that can deflect the bit or cause overheating, preserving hole accuracy and surface finish.
• Sharp cutting edges and robust geometry provide precise starts and clean holes, reducing wander and chatter on tough materials.
• Durable HSS-E construction delivers reliable performance under higher temperatures, extending tool life in repetitive production or challenging materials.
• Versatile deep-hole capability suited for steel, cast iron, and certain nonferrous alloys where depth and precision matter.

Practical usage notes to maximize performance: match cutting speeds and feeds to the material, use appropriate cutting fluid to minimize heat, and ensure solid workholding to prevent deflection during deep drilling. For best results, start with a light engagement to establish a true center, then progressively feed to maintain a steady, controlled cut. This approach helps you achieve consistently round, true holes with minimal burring or exit chatter.

The Somta Extra Long Series Drill - HSS-E Parabolic Flute - 10.5mm x 430mm is an expert-level option for machinists who demand reach, reliability, and high-quality hole geometry in challenging workpieces. Ideal for workshops, job shops, and production environments where deep drilling is a regular requirement.