Somta Extra Long Series Drill - HSS-E Parabolic Flute - 3mm x 155mm

The Somta Extra Long Series Drill - HSS‑E Parabolic Flute, 3 mm x 155 mm, is purpose-built for deep-hole work where reach and precision matter. This long-reach drill bit blends robust construction with smart flute geometry to deliver consistent results in demanding machining tasks.

Key advantages at a glance

• Extended reach — 155 mm flute length lets you drill deep into workpieces without repositioning or multiple setups, reducing cycle times and handling complexity.
• 3 mm diameter for precise pilot and finishing passes, enabling clean, accurate holes with tight tolerances.
• HSS‑E (High‑Speed Steel Enhanced) construction provides excellent durability and heat resistance, extending tool life in tough drilling environments.
• Parabolic flute design optimizes chip evacuation, dramatically reducing clogging and allowing steadier, smoother penetration through material.
• Sharp cutting edges deliver clean edges and accurate hole dimensions from the first cut, with reduced burr formation.
• Friction‑reducing geometry minimizes heat build‑up, helping maintain hole size and surface finish during longer drilling cycles.

Ideal use cases include deep-pocket drilling, long through-holes, and situations where a single drill must reach tight spaces or thick workpieces. This drill bit is a dependable choice for metalworking projects, fabrication tasks, and precision machining workflows that demand reliable performance without frequent tool changes.

Practical tips for best results

• Use a steady, controlled feed to leverage the parabolic flute’s chip evacuation. Let the flute do the work and avoid excessive side load.
• Apply a light cutting fluid or dry lubrication as appropriate for the material to minimize heat and extend edge life.
• Periodically retract the drill to clear chips and prevent clogging, especially on long drilling passes.
• Pair with compatible workholding to maintain alignment; straight, supported entry helps achieve truly perpendicular holes.

With the Somta Extra Long Series Drill, you gain a dependable deep-hole solution that combines reach, precision, and resilience — a single tool designed to tackle complex holes without compromising speed or accuracy.