Somta Long Series Drill - HSS-E Parabolic Flute - 7.8mm

The Somta Long Series Drill in HSS-E with a Parabolic Flute is built for serious deep-hole work. With a 7.8 mm diameter, this long-reach drill bites through thick materials with efficiency and precision, making it a go-to choice for through-holes and extended drilling tasks. Crafted from HSS-E (High-Speed Steel-E), it combines exceptional durability with heat resistance to stand up to demanding drilling environments without dulling early.

What makes this drill stand out

• Long-length design for deep holes and hard-to-reach workpieces, enabling you to complete through-thickness projects in fewer setups.
• HSS-E construction delivers superior wear resistance and sustained performance under higher temperatures, extending tool life in tougher metals.
• Parabolic flute geometry prioritizes chip evacuation, reducing clogging and cutting forces so you can maintain steadier feeds and smoother holes.
• Sharp cutting edges provide clean, accurate holes with minimal burr and finishing effort.
• Friction-minimizing flute design helps dissipate heat and lowers the likelihood of workpiece welds or built-up edge, boosting consistency across long drilling operations.

Practical usage and outcomes

Designed for professionals who regularly drill thick or layered materials, this drill is ideal for fabrication shops, maintenance workshops, and production environments where reliable deep-hole performance matters. Expect precise, true holes with a smooth entry and controlled exit, even in challenging metals. The 7.8 mm size makes it versatile for pilot-and-main-hole sequences or standalone deep-drilling tasks in steel, alloy, or similar hard materials.

Tips for best results

• Pair the drill with appropriate speeds and feeds for the material you’re working with; start conservatively and increase gradually to avoid overheating.
• Use a peck drilling approach when drilling deep holes to clear chips and maintain cutting efficiency.
• Ensure the workpiece is securely clamped and the drill is properly aligned to prevent deflection and achieve true hole geometry.
• Keep cutting edges sharp and inspect the flute geometry for signs of wear after extended use to preserve performance.

The Somta Long Series Drill - HSS-E Parabolic Flute - 7.8 mm is your reliable partner for deep-hole drilling where reach, durability, and clean results matter. Designed to tackle thick materials with confidence, it delivers consistent performance from first cut to final bore.