<Li> Strength of the workpiece (high feed rates will collapse thin wall tubing) </Li> <Li> Characteristics of the material being cut, chip flow depends on material type and feed rate . The ideal chip shape is small and breaks free early, carrying heat away from the tool and work . </Li> <Li> Threads per inch (TPI) for taps, die heads and threading tools . </Li> <Li> Cut Width . Any time the width of cut is less than half the diameter, a geometric phenomenon called Chip Thinning reduces the actual chipload . Feedrates need to be increased to offset the effects of chip thinning, both for productivity and to avoid rubbing which reduces tool life . </Li>

How to calculate feed rate for cnc milling