How to Improve the Installation Fit Accuracy of Crossed Roller Bearings？

To ensure high operational precision of crossed roller bearings, it is essential to maintain strict control over the fit accuracy during installation. The following measures can be taken:

1.Precision Measurement Without Deformation：

• Use Precision Instruments and Methods：Measure the mating surfaces of the crossed roller bearing’s inner bore and outer diameter using tools that do not deform the bearing.
• Comprehensive Data Analysis: Measure all relevant dimensions related to the inner and outer diameters, analyze the data thoroughly, and use the results as the basis for determining the fitting dimensions of the shaft and housing.
  
• Maintain Consistent Measurement Conditions: Ensure that measurements for both the crossed roller bearings and the mating components (shaft and housing) are carried out under the same temperature conditions to avoid thermal expansion errors.

2.Improve Surface Quality and Minimize Roughness：

For The surfaces of the shaft and housing that mate with the crossed roller bearings should have the lowest possible roughness to achieve a more precise and stable fit.

3.Identify Deviation Directions and Optimize Assembly Alignment:

Apply two sets of orientation marks on the following areas to help offset dimensional deviations during assembly:

• The inner bore and outer diameter of the bearing
  
• The corresponding surfaces of the shaft and housing
  

Align the maximum deviation directions of the mating components during assembly. This helps to:

• Improve the rotation accuracy of each bearing
  
• Reduce the coaxiality errors between shaft journals and housing bores
  

4.Surface Treatment and Fitting Techniques:

• Surface Reinforcement: Methods such as sandblasting or inserting slightly oversized precision plug gauges into the inner bore can help enhance the fit surface condition.
• Taper Fit Method (especially for large bearings with high interference): Machine a slight taper on both the outer ring and the housing bore.

By implementing the above measures, the installation fit accuracy of crossed roller bearings can be significantly improved, thereby enhancing the overall stability and service life of the equipment.

For more information, feel free to contact QIBR