ExtraCut 20 2D (F8320)
4 Flute Square End

Features

• Alternate Helix 20°/22°
• Center Coolant Supply
• Chamfer 45°
• Eccentric Relief
• Enhanced Core Size
• Length of Cut 2xD
• Non center cutting
• Optimized Flute Cross Section
• PVD Coated
• Unequal Indexing
• Weldon Flat

Application

• Intended for operations where there is a risk of pulling the workpiece out of the vice during machining, or for an unstable thin-wall workpiece like a tube or sheet metal that can vibrate due to axial end mill force caused by its helical flute.
• Machining of Ni-based Superalloys (Inconel, Nimonic)
• Milling of Mangan steels that tend to strain hardening at chip formation.

Annotation

• Alternate helix dampens vibrations
• These materials are characterized by poor machinability. Their machining requires a very sharp edge and smooth flute finish that prevents material build up.
• Weldon Flat Guarantees the Torque Transfer and Prevents the Shank Extracting (microcreeping)