Somta Extra Long Series Drill - HSS-E Parabolic Flute - 7.5mm x 225mm

Tackle deep, precise holes with the Somta Extra Long Series Drill in HSS-E and a parabolic flute geometry. Specifically engineered for extended reach, this 7.5 mm diameter drill bit (225 mm overall length) plunges into workpieces where standard bits simply can’t reach, delivering clean, accurate holes every time.

Why this long-reach drill design matters

Deep hole drilling demands stable guidance and efficient chip evacuation. The extra-long shaft extends your drilling capability without sacrificing rigidity, letting you access recessed cavities, blind holes, and internal channels in metal components. The parabolic flute is a standout feature: it actively shaves swarf away from the cutting edge and clears chips faster, reducing clogging and minimizing heat buildup that can dull edges or deform workpieces.

Material performance you can rely on

Made from HSS-E, this drill combines high-speed steel with enhanced heat resistance and durability. The result is a tool that maintains sharpness longer when drilling through steel, cast iron, aluminum, and other common metals. Precision-ground cutting edges ensure a clean entry and true hole alignment, while the parabolic flute profile lowers friction during operation, promoting smoother chip flow and longer tool life in tough drilling jobs.

Ideal use cases

• Deep recesses: reach deep pockets, internal bores, and through-holes in thick workpieces without repositioning.
• Machining and fabrication: metalworking tasks where exact hole diameter and straightness are critical.
• Automotive and general engineering: drilling accurate holes in metal housings, brackets, and assemblies.

Practical guidance for best results

• Use appropriate cutting fluid or lubrication to manage heat and extend edge life.
• Feed steadily with a depth stop to prevent over-penetration and maintain hole consistency.
• Start with a gentle pilot approach if needed, then step up to full depth to maintain stable cutting conditions.
• For accuracy, ensure the workpiece is well clamped and aligned to prevent deflection during entry.

Specifications at a glance

• Diameter: 7.5 mm
• Overall length: 225 mm
• Material: HSS-E (High-Speed Steel - Extra Durable)
• Flute: Parabolic for optimized chip evacuation and heat management
• Design focus: deep hole drilling with reliable straightness and clean finishes

With the Somta Extra Long Series Drill, you’re choosing a purpose-built solution for deep-hole challenges. It’s the go-to drill bit for professionals who need extended reach without compromising hole quality, precision, or tool life.