In order to increase work efficiency, it may be required to prolong the machine hours, i.e. it may work almost 24 hours a day, and if it works 25 days a month, it will work 600 hours a month, and 7200 hours a year. So its operating time will be 4-5 times longer than that of general toolroom machines. So to extend the machine's service life, the maintenance work is very necessary and important, and should be paid more attention to.