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When should I use Climb Milling (Down Milling) versus Conventional Milling (Up Milling)?

Best Answer

Many CNC machinists always use climb milling while many manual machinists always use conventional milling, but there are definitely advantages to using one versus the other depending on the cutting conditions.  

Manual machinists are used to conventional milling largely because its dangerous to use climb milling on machines that have much backlash as manual machines often do.  But on CNC machines with minimal backlash, there are definitely times when Conventional Milling is preferred to Climb Milling.  Our G-Wizard Calculator software will tell you which one is preferred for your exact cutting conditions in the Hints/Tips area of the screen, but you can also read the chapter on Climb vs Conventional Milling from our Feeds and Speeds Cookbook to learn a whole lot more about which method to use and how to decide.

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