Meet the Somta Extra Long Series Drill - HSS-E Parabolic Flute, a 13 mm diameter, 295 mm long drill bit engineered for deep-hole precision and steadfast durability in demanding shop environments.

Long reach, clean results

The extended 295 mm overall length lets you access deep cavities and thick workpieces without repositioning the setup. Combined with HSS-E construction, this drill bit delivers reliable performance under high heat and heavy cutting loads, helping you maintain accuracy and reduce tool changes on challenging jobs.

Parabolic flute for effortless chip evacuation

The parabolic flute geometry channels chips up and out of the hole with minimal resistance. This reduces chip clogging, lowers heat buildup, and promotes steadier cutting — translating to smoother starts, tighter tolerances, and cleaner hole bottoms on every pass.

Precision you can trust

Sharp, well-supported cutting edges bite consistently, producing true round holes with uniform diameter. The flute design minimizes friction at the cutting edge, delivering steadier performance on both manual drill presses and CNC machines while extending tool life.

Ideal for a range of deep-hole tasks

• Deep-hole drilling in steel, stainless steel, cast iron, and non-ferrous materials where accessibility is limited.
• Applications across automotive, aerospace, fabrication, and maintenance where long-reach reliability matters.
• Compatible with manual and CNC drilling setups that require sustained performance over long cutting cycles.

Practical tips for optimal results

• Set appropriate spindle speed and feed rate for the material, and use coolant to control temperature and clear chips.
• Consider a small pilot hole to improve start accuracy and reduce wandering on harder metals.
• Use a peck drilling technique to periodically retract and clear accumulated chips, preserving edge life.
• Secure the workpiece firmly and minimize deflection, especially with thin or flexible parts.
• Keep the edge sharp and store the bit in a protective holder to maintain performance between jobs.