Taking the unique structure of the HMC500 spindle systems as the research object,the temperature field model of the spindle systems was established. It is found that the thermal deformations of the spindle systems have a good correspondence with the temperatures. Spindle deformation increases are caused by spindle heat increases. The spindle bearing friction heats are an important reason for the heat generated by the spindle systems. The experimental results show that the maximum temperature rise of the spi...