Up milling and down millingwhich is better

Conventional milling, also called up milling, involves cutting with the tool rotating opposite to the feed direction, resulting in gradually increasing chip thickness. Non-conventional milling, or down milling, cuts with the tool rotating in the same direction as the feed for maximum chip thickness at the start and less heat generation. Down milling provides better surface finish and tool life compared to conventional milling, but conventional milling is better for some materials.Read less

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