Meet the Somta Extra Long Series Drill — HSS-E Parabolic Flute — 8.5mm x 305mm. Designed for deep-hole work, this drill delivers extended reach without compromising cutting precision, making those hard-to-reach holes practical and repeatable.

Why this drill stands out for deep-hole drilling

• Extended reach with uncompromised rigidity: The extra-long length enables drilling deeper into workpieces where standard drills fall short, helping you complete through-holes and internal bores in a single setup.
• HSS-E construction for durability: Built from high-speed steel with enhanced properties, this drill is crafted to resist heat and wear during demanding drilling tasks, helping extend tool life in challenging materials.
• Parabolic flute for efficient chip evacuation: The parabolic flute geometry dramatically improves chip flow and reduces clogging, which minimizes dwell time and prevents clog-related chatter in long holes. This feature is a hallmark of Somta’s deep-hole design.
• Sharp cutting edges and robust geometry: The drill’s geometry is optimized to cut cleanly from the first contact, delivering accurate hole diameters with steady performance as you drill deeper.
• Standard-compatible, purpose-built for metalworking tasks: Engineered for reliability in common machining setups, this drill balances long reach with predictable results in repetitive deep-hole applications.

Ideal use cases

Best suited for machinists, fabricators, and toolmakers tackling deep bores where access is limited or where multiple features share a common depth. Whether you’re creating long blind holes in fixtures, molds, or automotive components, this Somta drill provides the reach you need without sacrificing hole quality.

Practical tips for optimal results

• Use steady, moderate feed rates and allow coolant or lubrication to flow along the flute to manage heat buildup in deep holes.
• Start with a precise center or pilot mark to reduce wandering at the entry point, then advance gradually to full depth.
• Securely clamp the workpiece and ensure concentric alignment to minimize deflection and maintain hole straightness.
• Clear chips regularly to prevent clogging and maintain cutting efficiency as you drill deeper.

The Somta Extra Long Series Drill — HSS-E Parabolic Flute — 8.5mm x 305mm combines extended reach, robust cutting performance, and advanced flute geometry to tackle deep-hole drilling with confidence and consistency.