(1) speed and temperature rise
    With the development of science and technology, the spindle speed is getting higher and higher, variable speed range is growing, therefore, the requirements are also increasing the stability of the high-speed operation of the bearing. Machine tool spindle bearing temperature rise is an important factor to limit the speed of the bearing. Under normal circumstances, the correct choice of bearing type, tolerance levels, allocation, clearance (preload) size, lubricants and lubrication methods, the high-speed rolling bearing performance can be increased to a certain extent.
   
(2) life and load carrying capacity
   
General machine tool spindle component life means to maintain the accuracy of the spindle of the period of use, therefore, the bearing accuracy is required to maintain the performance to meet the requirements of the spindle component life. Heavy machine or heavy cutting machine, you should first consider the carrying capacity of the bearing.
   
(3) the stiffness and vibration resistance
   
In order to ensure the quality of the machining spindle system must have sufficient rigidity, otherwise it will produce complex mapping error or flutter. Vibration resistance means to resist the forced vibration and the ability to self-excited vibration. The vibration of the spindle components depends on the spindle and the bearing stiffness and damping. Using preload rolling bearing can effectively improve the stiffness of the spindle system.



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