The feed rate smaller than the width of the chamfer is beneficial to machining, so that the cutting edge is
subjected to compressive stress. If the feed rate is bigger than the width of the chamfer, the cutting edge of
the cutting tool is not only subjected to compressive stress, but also bears shear stress in some very serious
cases. In the case of intermittent processing, sometimes the feedrate has to be reduced to reduce the cutting
pressure so that a large amount of heat is transferred to very thin chips.
The best method for overcoming intermittent cutting is: select a bigger negative chamfer, reduce the feed rate,
and the corresponding cutting speed.