Tool service life during precision parts processing

In the process of machining precision parts, the total cutting time T elapsed after the tool is sharpened or a cutting edge of a new blade starts cutting until the wear amount reaches the blunt standard is called tool life. Note: Tool life T does not include non-cutting time such as tool setting, measurement, fast forward, and return.
Tool life refers to the probability that the tool can complete the rated work under the specified cutting conditions and time during the processing of precision parts. That is, the probability that the tool can complete the predetermined cutting time without being damaged under the determined working conditions and cutting specifications.
When choosing a tool, you should also consider the following:
(1) The service life of complex, high-precision, multi-edged tools should be longer than that of simple, low-precision, single-edged tools.
(2) Indexable cutting tools are quick and easy to change edges and inserts. In order to keep the cutting edge sharp, the life of the cutting tool can be chosen to be lower.
(3) The cutting load of finishing tools is small, and the life of the tool should be higher than that of roughing tools.
(4) When finishing large workpieces, in order to avoid tool changes midway, the tool life should be selected to be relatively high.
(5) The life of cutting tools in CNC machining should generally be longer than one working shift, or at least longer than the cutting time of one part.