Somta Long Series Drill - HSS-E Parabolic Flute - 9.5mm

Somta Long Series Drill - HSS-E Parabolic Flute - 9.5mm is built for serious deep-hole work in metal, delivering reliable reach, precision, and efficiency in a single, rugged tool. This long-series drill taps into a disciplined combination of superior material, geometry, and craftsmanship to tackle thick workpieces with confidence.

What makes it stand out

• Extended reach for deep holes: The long-length design lets you drill through substantial thicknesses without repositioning, reducing setup time and improving hole alignment on long workpieces.
• HSS-E construction: High-Speed Steel with enhanced alloying delivers outstanding durability and heat resistance, maintaining sharpness under demanding drilling tasks.
• Parabolic flute for efficient chip evacuation: The parabolic flute geometry channels chips away from the cut quickly, lowers cutting forces, and minimizes clogging, which helps sustain surface finish and drill life.
• Sharp, consistent cut: Precision-ground cutting edges deliver clean, accurately sized holes with minimal burr formation, even in tougher materials.
• Reduced friction and heat buildup: The flute design reduces contact-area friction, helping manage heat during extended drilling sessions and prolonging tool life.
• Diameter and compatibility: 9.5 mm (approximately 3/8") diameter fits standard drill chucks and fixtures, making it a practical addition to any metalworking toolkit.

Ideal use cases

Perfect for through-holes and deep-pocket drilling in steel, stainless steel, cast iron, and aluminum. Whether you’re fabricating chassis, machining engine components, or preparing thick metal plates, this long-series drill delivers predictable hole quality and reliable performance where shorter bits struggle to reach.

Practical tips for best results

• Set appropriate speeds and feeds: Start with conservative speeds for the material, then adjust to balance cutting efficiency with heat management.
• Use coolant or lubrication: Apply steady coolant to reduce heat, extend edge life, and improve hole quality in tougher materials.
• Stabilize the workpiece: Secure the workpiece firmly to prevent deflection during deep drilling.
• Pilot when necessary: For very hard materials or tight tolerances, consider a light pilot hole to guide the drill and reduce stress on the flute.
• Clear chips regularly: If drilling long depths, pause to clear chips and reapply lubrication to maintain consistent performance.

Who benefits most

Metalworking shops, fabrication facilities, automotive and aerospace component manufacturers, and serious hobbyists who routinely drill deep holes through thick materials will appreciate the reliability, precision, and reach of the Somta Long Series Drill in 9.5 mm.

With its combination of long reach, durable HSS-E construction, and chip‑evacuating parabolic flute, this drill is designed to deliver consistent hole quality when depth and material thickness would challenge ordinary bits. Add it to your toolkit for deeper, cleaner holes and lasting performance.