Precision machining, various types of rolling bearings can achieve high accuracy requirements, but in the application of high precision bearings used in most of the angular contact ball bearings, both in high-precision metal-cutting machine tool spindle high stiffness requirements double row cylindrical roller bearings are also a lot of second tapered roller bearings.
Bearing processing technology development, most of the international level of precision bearings at all levels of refined error in the standard value of 1/2, such as the roundness of the ball bearings for machine tools 0.3, compared with the computer 0.25um .
Overall, precision bearings selection, first select from the above three types. Moreover, even in these three types, nor is each specification has a precision product production, you must also find sample of each bearing the company or the manufacturer, or its bearing sales department to ask. Usually P4 level precision bearings easier to buy into, and most of the P2-precision bearings obtained by special order. The first production of precision products according to trial new products processing.
To get high-precision spindle bearing, in principle, can be summarized as follows:
(1) use high-precision bearings and through the application of technology to improve its accuracy;
(2) pay attention to the application of technology, such as error cancellation method to improve installation accuracy, smaller interference method to reduce raceway deformation, adjust the clearance method to improve the positioning accuracy and rotation accuracy;
(3) eliminate the cause of the influencing factors of the bearing loss of accuracy.
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