The Dormer Pramet C346 7.0mm HSS-E Flatted Shank 3 Flute Long Series Slot Drill (DIN 844 L) is a precision end mill designed for shoulder and slot milling in steel and copper alloys. Built for reliability in demanding machining, it delivers consistent slot quality and extended tool life.

• Diameter: 7.0 mm
• Length of cut: 30 mm
• Overall length: 80 mm
• Shank: Weldon 10 mm
• Material: HSS‑E cobalt-based for enhanced hardness and wear resistance
• Cutting edges: 3 flutes for efficient chip evacuation
• Coating/Finish: Bright finish
• Helix angle: 30° to promote smooth cutting and reliable chip flow
• Rake angle: 12° to reduce cutting pressure and improve performance in free machining steel and copper alloys
• Standard: DIN 844 L compatibility for broad toolholding support
• Applications: Shoulder milling and slot milling in free machining steel and copper or copper alloys

Designed for deep pockets and precise slots, this long-series drill maintains rigidity and accuracy through rigorous cutting conditions. The 30° helix works with the 3-flute geometry to deliver steady, gradual material removal, while the 12° rake angle helps manage built-up edge and chip flow in challenging metals. With a Weldon 10 mm shank, it places securely in collets and adaptors, enabling stable milling and reduced vibration. If you’re machining components that require clean shoulders and tight slots in free machining steel or copper alloys, the C346 line offers a dependable, long-reach solution.