The Somta Extra Long Series Drill – HSS-E Parabolic Flute – 13.5mm x 310mm is built for precision and reach. When your workpiece demands deep access, this drill delivers a clean, accurate hole from start to finish, without compromising rigidity or control. The generous 310mm overall length is paired with a 13.5mm diameter to tackle extended bore requirements that standard drills simply can’t reach.

Key features that matter in real-world drilling

• Extra-long reach for deep holes — extended length lets you drill into thick workpieces or through long assemblies with confidence, reducing the need for multiple setups.
• HSS-E construction — High-Speed Steel-E design delivers enhanced durability and heat resistance, helping the tool stand up to demanding drilling tasks and offering longer tool life.
• Parabolic flute for superior chip evacuation — the rounded flute geometry moves chips away from the cutting edge efficiently, minimizing clogging and maintaining consistent cutting action even on deep holes.
• Sharp cutting edges for clean results — precise edge geometry ensures true starts and smooth hole finishes, reducing burr formation and improving hole accuracy.
• Friction- and heat-reducing flute design — streamlined flute geometry lowers contact area during drilling, helping to keep temperatures down and extend tool life in tougher materials.

Why this drill stands out for deep-hole work

Traditional short drills often struggle with chip packing and heat buildup when drilling long holes. The Somta Extra Long Series Drill tackles these challenges head-on with its parabolic flute profile and robust HSS-E core. The result is reliable penetration, steady feed, and consistent hole geometry from the surface to the terminus of the bore. This makes it an ideal choice for tasks like penetrating thick sections, long through-holes, and precision bores in assemblies where accuracy and repeatability are critical.

Practical use and best practices

• Start with a precise center punch or a small pilot to guide the drill and prevent wandering on initial contact.
• Use slow-to-moderate cutting speeds and maintain steady, even feed to maximize the life of the HSS-E flute and preserve hole quality.
• Apply appropriate lubrication or coolant to manage heat during extended drilling cycles; keep chips flushed away to prevent re-cutting.
• Peck drilling can help when drilling very deep holes—pause occasionally to clear chips and reduce load on the cutting edge.
• Secure the workpiece firmly and use proper workholding to maintain consistent hole alignment throughout the bore.

With the Somta Extra Long Series Drill, you invest in a purpose-built solution for deep-hole drilling needs. It’s not just about making a hole—it’s about making a clean, accurate, long-reach hole that you can rely on in demanding applications.