In manufacturing processes, machining time is the theoretical or measured duration required to remove material in a given operation, and reducing it is the common lever underlying the industry objectives of higher productivity, lower machining cost, and higher profit rate, since idle time, tool-change time, and actual cutting time all sum to total production time per piece. Estimation of machining time by calculation uses a common structural relationship across turning, drilling/boring, shaping/planing, and milling: total length of relative travel between tool and workpiece (job length plus approach, overrun, and geometry-dependent allowances) divided by the feed rate and rotational/stroke speed, where the cutting velocity and feed themselves must be judiciously selected based on work-material properties, tool-material properties, nature of cut, cutting-fluid use, machine condition/capacity, and desired surface finish.
In manufacturing processes, machining time is the theoretical or measured duration required to remove material in a given operation, and reducing it is the common lever underlying the industry object…