<P> When deciding what feed rate to use for a certain cutting operation, the calculation is fairly straightforward for single - point cutting tools, because all of the cutting work is done at one point (done by "one tooth", as it were). With a milling machine or jointer, where multi-tipped / multi-fluted cutting tools are involved, then the desirable feed rate becomes dependent on the number of teeth on the cutter, as well as the desired amount of material per tooth to cut (expressed as chip load). The greater the number of cutting edges, the higher the feed rate permissible: for a cutting edge to work efficiently it must remove sufficient material to cut rather than rub; it also must do its fair share of work . </P> <P> The ratio of the spindle speed and the feed rate controls how aggressive the cut is, and the nature of the swarf formed . </P> <P> This formula can be used to figure out the feed rate that the cutter travels into or around the work . This would apply to cutters on a milling machine, drill press and a number of other machine tools . This is not to be used on the lathe for turning operations, as the feed rate on a lathe is given as feed per revolution . </P> <P> F R = R P M × T × C L (\ displaystyle FR = (RPM \ times T \ times CL)) </P>

What is meant by feed in lathe machine