Design and Study for Ceramic Bearings Electric Spindle Units

?Excellent performance and applications actuality of electric spindle for highspeed machine tools was introduced in the paper. According to the study of electric spindle unit for grinding machine, structure design of highspeed electric spindle units in the process of design and manufacture was discussed, the choice of electric spindle bearing, mechanics performance of ceramic bearing and initial value of axial load for bearing was studied, and the cool and lubricate system of electric spindle was analyzed. By the experiment of electric spindle for performance test, it was shown that this type of electric spindle had fine design, high rigidity, big power, good dynamic and static property, and provided the technology foundation for the electric spindle's practical applications on the highspeed machine tools.