Thermal characteristics of high-speed precision spindle bearings

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High-speed electric spindle is the core component of the high-speed machine tools, precision of various parts of the electro-spindle unit μm level, such as beating for 1 ~ 3μm, spindle s tiffness generally 100-300N/μm, electric spindle parts precision error and a small amount of deformation.ball bearing suppliers
However, when the high-speed operation, the great bearing heat, resulting in bearing temperature is high, and causes thermal deformation. The accuracy of the error caused by the thermal deformation is much larger than the error and the amount of deformation. Moreover, thermal deformation directly change the preload condition, affecting the stiffness characteristics of the bearing, and the machining accuracy of the electric spindle, serious, or even cause the bearing thermal occlusion, so that the electric spindle destroyed.miniature bearing
The electric heating problem spindle reduce its reliability in actual production applications. Therefore, bearing thermal analysis and master bearing hot charac teristics are extremely important to improve the stability and reliability of electric spindle machining. The high-speed precision angular contact ball bearings are the most widely used in the machine tool spindle unit bearing such bearing object of study, analysis and calculation of the thermal characteristics of high-speed precision spindle bearing system made more meaningful.steel ball bearings