Installation of angular contact bearings

There are four installation methods for angular contact ball bearings:



-Back-to-back installation (DB combination): Installing the wide end faces of two bearings relative to each other can increase the rigidity of radial and axial support angles, with the maximum deformation resistance and the ability to withstand axial loads acting in both directions. During installation, there should be a gap of 0.2-0.5mm between the seat ring of the bearing and the bearing seat hole to compensate for errors caused by inaccurate machining and installation of the parts. When installed correctly, the seat ring can automatically adapt to the rolling of the rolling element, ensuring that the rolling element is located on the upper and lower raceways.

-Face to face installation (DF combination): Install the narrow end faces of two bearings relative to each other, with a smaller support angle rigidity, which can eliminate the original clearance of the outer ring and increase the preload of the bearings. This installation method bears less axial load.

-Parallel combination installation (DT combination): Installing the wide end faces of two bearings in the same direction can enable the two bearings to share the working load in the same direction. But to ensure axial stability during installation, two pairs of bearings arranged in series must be installed opposite each other at both ends of the shaft.

-Free combination installation (DU combination): Any combination installation, this installation method is relatively flexible, and different installation methods can be selected according to the actual situation.



Regardless of the installation method used, a rotation test should be conducted after installation is completed. Apply power for no-load and low-speed operation, then gradually increase the rotational speed and load according to the operation situation, and detect noise, vibration, and temperature rise. If any abnormalities are found, stop the operation and check.