For Aluminum we recommend the Helical 3 Flute Variable Pitch End Mill with a 40° Helix. The Variable Pitch will break up Harmonics and all 3 Flutes come to center with this tool making it ideal for Ramping (there is usually always ramping in High Efficiency Milling). Make sure to take a stepover at 7%-11% of the Tool Diameter and go utilize Helical's Milling Advisor for Speeds/Feeds.
Step 2: Select a End Geometry:
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