how to measurings the spherical roller bearing clearance?

The measuring method of feeler gauge is the main method to detect the spherical roller bearing clearance with adjustable center. The method is simple and efficient. However, since the limit gauge method is adopted, the definite value of clearance cannot be determined. In the practical application of production, often due to the skills of the measurement personnel, measurement personnel physical changes. Because of the same feeler, the strength of the people can draw but the strength of the people can not draw the measurement error.

In addition, there are many ambiguity in the criteria for detecting spherical roller bearing clearance with the feeler gauge method, which are shown as follows:

1) test the spherical roller bearing clearance between the outer ring of the plug and each row of rollers with a larger feeler gauge. If the clearance at three rollers can pass through the feeler gauge and the rest cannot, the thickness of the feeler gauge shall be determined as the maximum radial spherical roller bearing clearance under test; Test the spherical roller bearing clearance between the outer ring of the plug and each row of rollers with a smaller feeler gauge. When the clearance at the three rollers cannot pass through the feeler gauge but the rest can, the thickness of the feeler gauge is set as the minimum spherical roller bearing clearance under test.

2) the measurement of radial spherical roller bearing clearance with adjustable center is generally carried out with a feeler gauge, and the selection of the feeler gauge is determined according to the size of the radial spherical roller bearing clearance. In the clearance of the maximum and the minimum are chosen as a feeler gauge, thickness is equal to the maximum limit of size (end), however, thin, the minimum limit of size is equal to the product (end), they measure the radial clearance of product, insert the plug piece roller rotating ring with outer raceway and roller cage components, a week in a row three roller can pass, and on the rest of the roller can't plug slice thickness for the utmost radial clearance of the bearing. Three consecutive rollers cannot pass, and the thickness of the plug that can pass on the rest of the rollers is the maximum of the bearing.

3) inspection of radial clearance of large and extra-large cylindrical roller bearings and spherical roller bearings with adjustable center. The radial spherical roller bearing clearance is allowed to be checked with a feeler gauge, and the maximum and minimum clearance of the bearings are determined as follows : (1) the maximum radial spherical roller bearing clearance. When measured along the circumference of each row of rollers and raceway with a feeler gauge, the thickness of the feeler gauge is the maximum when it can pass on three rollers and cannot pass on the rest· wide play. (2) minimum radial clearance. When measuring the circumferential clearance of each row of rollers and raceway with a feeler gauge, it cannot pass on three rollers, while the thickness of feeler gauge is the minimum spherical roller bearing clearance when it can pass on the rest rollers. There is some error in measuring and checking radial clearance with feeler gauge. Therefore, the maximum and minimum clearances measured are allowed to be greater than or less than 0.01mm of the specified limit value. And that's the largest Gap 3 Operative mean value.

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