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What are the reasons why precision spindle bearings are different from ordinary bearings?1
Precision spindle bearings are divided into P0-P5, and the grades gradually increase. Among them, P0 is ordinary precision, and the other grades are all high-precision grades. Of course, different classification standards and different types of bearings have different classification methods, but the meaning is the same. The performance index of precision spindle bearings stipulates that the rotating body has high runout accuracy, high-speed operation, and specified friction and small friction changes. Precision spindle bearings need to be differentiated from general rolling bearings in the following aspects: 1. The specified values of specifications are different, and the specification error (inner diameter, diameter, oval, etc.) of products with high precision grades is smaller than that of bearings with low precision grades. ; 2. The specified value of rotation accuracy is different. The rotation accuracy of products with high precision grade is more stringent than the specified value of bearing with low precision grade; 3. The specified value of appearance shape and appearance quality is different. The appearance shape and appearance quality of the product (the appearance surface roughness of the raceway and the groove, the circular deviation and the groove shape error, etc.) are stricter than the values specified for products with lower precision grades; Raw materials are more favorable than the raw material characteristics of products of general precision grades. Only when the torque is accurate can the rotation be stable!
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