The Somta Extra Long Series Drill — HSS-E Parabolic Flute, 4mm x 280mm, is purpose-built for deep-hole drilling where reach and reliability matter most. This precision drill combines extended length with a robust HSS-E (High-Speed Steel Enhanced) composition to withstand heat, wear, and demanding workloads, delivering consistent, accurate holes even when access is challenging.

Why this extra-long drill stands out

• Extended reach for deep holes. At 280mm in length, this drill can access recessed features, internal bores, and hard-to-reach workpieces without sacrificing rigidity.
• HSS-E durability. The enhanced high-speed steel formulation provides superior wear resistance and heat tolerance, extending tool life on tough materials.
• Parabolic flute for efficient chip evacuation. The parabolic flute geometry channels chips away from the cutting edge, minimizing clogging, reducing heat buildup, and promoting smoother, more stable drilling.
• Clean, accurate holes. Sharp cutting edges and optimized flute geometry deliver precise hole diameters with minimal runout, even in harder metals.
• Versatile for metalworking applications. Ideal for automotive, aerospace, and general manufacturing tasks where deep holes in steel, alloy, and similar substrates are required.

Practical use cases and scenarios

• Drilling deep clearance holes in engine blocks, jigs, and fixtures where access is limited.
• Creating blind holes in thick workpieces without compromising hole straightness or finish.
• Finishing deep bore operations in stainless steel or alloy steels where heat resistance and edge retention matter.
• Prototyping and fabrication projects that demand reliable, repeatable deep-hole performance.

How this drill helps you work smarter

• Minimize tool changes on complex assemblies by completing deep-hole tasks with a single, long cutting edge.
• Reduce downtime from chip buildup thanks to the parabolic flute’s efficient evacuation, keeping cutting forces steady.
• Achieve consistent hole quality across multiple stations or fixtures, thanks to durable HSS-E construction and precise geometry.

Tips for optimal performance

• Use appropriate cutting fluid or lubricant for metal drilling to maximize tool life and minimize heat.
• Feed and spindle speeds should align with the material being drilled; start at conservative values and adjust to maintain steady chip flow.
• Peck drilling in shallow steps when drilling very deep holes to prevent chip packing and overheating.

Whether you’re building intricate components, servicing deep bores, or fabricating complex fixtures, the Somta Extra Long Series Drill — HSS-E Parabolic Flute — 4mm x 280mm delivers extended reach, dependable durability, and clean, precise results with every use.