The Somta Extra Long Series Drill in HSS-E with a Parabolic Flute is built for engineers, fabricators, and mechanics who regularly face deep-hole challenges. With a precise 7 mm cutting diameter and a substantial 290 mm flute length, this drill bites through metals with confidence and maintains a straight, true bore from start to finish.

Why this 7 mm x 290 mm drill stands out

• Extended reach for deep holes: The extra-long 290 mm flute length lets you drill deep into workpieces without repositioning or re-chucking, saving time on multi-step projects.
• HSS-E durability: Made from High-Speed Steel with enhanced properties, it delivers reliable wear resistance and heat tolerance for repeated use in demanding metals.
• Parabolic flute design: Optimized chip evacuation reduces clogging, lowers cutting temperatures, and promotes smoother hole creation in hard materials.
• Sharp, precise cutting edges: Clean holes with minimal pecking, reduced drifting, and consistent diameter control—essential for critical assemblies and toleranced components.
• Versatile material compatibility: Suited for common metals encountered in fabrication and workshop environments, including steel, cast iron, and nonferrous alloys, where deep holes are required.

Ideal use cases

• Automotive and industrial fabrication tasks involving deep-pocket or through-hole drilling
• Machining engine housings, brackets, and structural components where depth exceeds standard drill reach
• Prototyping and maintenance work that demands single-pass bore accuracy in confined spaces

Practical tips for best results

• Secure the workpiece firmly and use a center drill to establish a precise starting point before drilling.
• Adopt a controlled pecking approach to clear chips and prevent binding; pause to evacuate debris as needed.
• Use appropriate cutting fluid or coolant to extend tool life and manage heat during deep-hole drilling.
• Match spindle speed and feed rate to the material being drilled; start conservatively and increase gradually as you verify hole quality.

Designed for reliability in professional shops and serious hobbyist setups alike, the Somta Extra Long Series Drill combines reach, durability, and efficient chip management to help you complete deep-hole projects with confidence. For operators who value precision and uptime, this 7 mm x 290 mm HSS-E parabolic drill is a practical, long-term addition to the toolkit.