Rolling bearings are mainly used in three parts: main shaft, ball screw and general transmission shaft. So how should CNC machine tools, machining centers and precision machine tools choose bearings? The editor will analyze for you today how to choose precision machine tool bearings, machining center spindle bearings, and CNC machine tool spindle bearings! For the spindle support of high-speed and high-precision machine tools such as CNC machine tools and machining centers, super-precision bearings of P4 and above should be selected, and the spindle of precision machine tools should be selected with precision above P5. P4 and above super-precision bearings are used in the spindle support of high-speed and high-precision machine tools such as machining centers. As the basic supporting component of CNC machine tools, spindle bearings directly affect the speed, rotation accuracy, stiffness, shock resistance and vibration cutting performance, noise, temperature rise and thermal deformation of CNC machine tools, and affect the precision and surface quality of machined parts. Therefore, high-performance machine tools must be equipped with high-performance bearings. The rotation accuracy of the spindle system refers to the accuracy of radial runout, section runout and axial runout. The accuracy of the spindle system is mainly affected by the following factors. 1. The groove radial runout of the bearing ring corresponds to the main shaft of the main shaft system, thus reflecting these errors on the machined surface. 2. The diameter of the bearing rolling body is inconsistent, and the shape error will lead to the regular error of the main shaft. 3. The lateral swing of the groove to the end face will cause the axial movement of the main shaft. The influence of axial movement on precision grinding machines, especially bearing grinding machines, is particularly obvious. If the method of groove grinding is adopted, the reject rate and noise will be greatly increased. The size and position error of the bearing installation surface will cause the corresponding deformation of the bearing roller, tilt the inner and outer rings of the bearing, make the stiffness of the bearing inconsistent in all directions, and reduce the rotation accuracy of the spindle system. The end faces of nuts, partition sleeves and washers for adjusting the gap need to be ground, and the verticality of the shaft rotation axis should correspond to the accuracy of the installed bearings, otherwise the working accuracy of the bearings will be reduced. We have 37 years of experience in R&D, production and testing of bearings, focusing on R&D and production of machining center spindle bearings, CNC machine tool spindle bearings, and precision machine tool bearings. The size range of the outer diameter is up to 450mm, the inner hole size is more than 10mm, and the precision is P0 P6 P5 P4 P2. The enterprise standard is higher than the national standard. At the same time, we can assemble precision angular contact bearings according to the requirements of customers' application scenarios and customize them professionally. Only when the torque is accurate can the rotation be stable!
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