Basic requirements for rolling bearings for machine tool spindles

Source: China Bearing Network Time: 2013-08-03

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1. The speed and temperature rise follow the development of science and technology; the spindle speed of the machine tool is getting higher and higher; the shifting scale is getting larger and larger; therefore, the demand for high-speed working stability of the bearing is getting higher and higher. The temperature rise of the spindle of the machine tool is the speed of the restrained bearing. Important factors. Under normal circumstances; correctly select the bearing type, public service level, equipment method, clearance (preload) size, smoothing agent and smooth method; can improve the high-speed function of rolling bearings to a certain extent.
2. Lifespan and carrying capacity For the normal machine tool, the life of the spindle component mainly refers to the application period of the spindle precision. Therefore, the accuracy of the required bearing adheres to the requirement of the spindle life of the functionally satisfied spindle. About heavy-duty machine tools or powerful cutting machine tools The primary bearing of the bearing should be considered.
3. Stiffness and vibration resistance to ensure the processing quality of the machine tool; it is necessary to make the spindle system have the rigidity; otherwise, large re-allocation errors and even flutter will occur. Anti-vibration refers to the ability to resist forced vibration and self-exciting sensation. The vibration resistance of the spindle assembly depends on the stiffness and damping of the spindle and the bearing. The preloaded rolling bearing can be used to effectively improve the stiffness of the spindle system.
4. The noise is in the high-speed grinding machine; the noise of the grinding head bearing is the main component in the noise of the whole machine; the low-noise rolling bearing should be selected.

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