For self-aligning bearing, when installing the bearing with shaft into the shaft hole of the box, the middle mounting ring can prevent the outer ring from tilting and rotating.
It should be remembered that the balls of some sizes of self-aligning ball bearings protrude from the side of the bearing, so the middle mounting ring should be recessed to prevent damage to the balls. Self-Aligning Bearing A large number of bearings are generally installed by mechanical or hydraulic press in method.
For separable bearings, the inner ring and outer ring can be installed separately, which simplifies the installation process, especially when the inner and outer rings need Self-Aligning Bearing interference fit. When installing the shaft with the inner ring installed in place into the bearing housing with the outer ring, pay attention to check whether the inner and outer rings are correctly aligned to avoid scratching the bearing raceway and rolling parts.
If cylindrical and needle roller bearings use an inner ring without flange edge or an inner ring with flange edge on one side, it is Self-Aligning Bearing recommended to use a mounting sleeve. The outer diameter of the sleeve shall be equal to the inner race diameter F, and the tolerance standard for machining shall be D10.
For tapered bore bearings, the inner ring is always installed with an interference fit. Unlike cylindrical bore bearings, the interference Self-Aligning Bearing of tapered bore bearings is not determined by the selected shaft fit tolerance, but by the advancing distance of the bearing on the tapered journal, shaft sleeve or withdrawal sleeve.
The radial internal clearance of the bearing decreases with the advance of the bearing on the conical journal. By measuring the reduction value, the degree of interference and the Self-Aligning Bearing tightness of the fit can be determined.
When installing self-aligning ball bearings, carb ring roller bearings, spherical roller Timken bearings and high-precision cylindrical roller bearings with conical holes, the Self-Aligning Bearing reduction value of radial internal clearance or the axial propulsion distance on the conical base shall be determined as the measure of interference. See the relevant product section for the guidance values of clearance reduction and axial propulsion distance.
Small bearings can be pushed to a conical base using nuts. In the case of shaft sleeves, sleeve nuts are used. The small disassembly sleeve can be pushed into the bearing hole with a Self-Aligning Bearing nut. The nut can be tightened with hook wrench or pneumatic wrench. Before installation, add a little oil to the surface of journal and sleeve.
The installation force required for large Timken bearings is significantly increased and hydraulic nuts and / or oiling methods shall be used. The above two methods can significantly simplify the installation process. The oil filling equipment required to Self-Aligning Bearing operate the hydraulic nut and use the oil filling method is supplied. For details of these products, see the relevant section in the online catalog “maintenance and lubrication products”.
When the hydraulic nut is used to install the bearing, it must be positioned on the threaded part of the journal or the thread of the sleeve, so that the annular piston is close to the inner ring of the bearing, the nut on the shaft or the retaining ring installed at the shaft end. Press the oil pressure into the hydraulic nut through the oil pump to move the piston axially with the force required for accurate installation. Use the hydraulic nut to install the spherical roller bearing onto the
Using the oil injection method, the oil is injected between Timken bearing and journal under high pressure to form an oil film. This oil film separates the mating surfaces and significantly reduces the friction between the mating surfaces. This method is generally used when installing the bearing directly on the conical journal, but it is also used to install the bearing on the set sleeve and push sleeve specially prepared for the oil injection method.
The oil pump or oiler generates the necessary pressure to inject oil between the mating surfaces through the groove and oil distribution channel on the shaft or sleeve. When designing the bearing layout, the necessary grooves and channels on the shaft must be considered. The spherical roller bearing is installed on the withdrawal sleeve with oil groove. The withdrawal sleeve is pressed into the bearing hole by injecting oil into the mating surface and tightening the screws in turn.