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How to install the bearing

by:JNSN     2021-12-19
For tapered bore bearings, the inner ring is always installed with an interference fit. Unlike cylindrical bore bearings, the interference 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, bushing or withdrawal sleeve. The radial internal clearance of the bearing decreases as the bearing advances on the tapered journal. By measuring the reduction value, the degree of interference and the tightness of the fit can be determined. When installing self-aligning ball bearings, CARB toroidal roller bearings, spherical roller bearings and high-precision cylindrical roller bearings with tapered bores, determine the radial internal clearance reduction or the axial advancement on the tapered base Distance, as a measure of interference. For the guide value of the clearance reduction value and the axial advance distance, please refer to the relevant product section.  Small Bearings For small bearings, nuts can be used to push it to the conical base. In the case of sleeves, turnbuckles are used. The small withdrawal sleeve can be pushed into the bearing hole with a nut. The nut can be tightened with a hook wrench or pneumatic wrench. Before starting the installation, a little oil should be added to the surface of the journal and sleeve.  Large and medium-sized bearings   The installation force required for large bearings is significantly increased, and hydraulic nuts and/or oil injection methods should be used.   The above two methods can significantly simplify the installation process. The oil injection equipment required to operate the hydraulic nut and use the oil injection method is supplied. For detailed information about these products, see the relevant sections in the online catalog 'Maintenance and Lubrication Products'.   When using hydraulic nuts 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 on the shaft end. The oil is pressed into the hydraulic nut through the oil pump, and the piston is moved in the axial direction with the force required for safe and precise installation. Use hydraulic nuts to install the spherical roller bearing to the    using the oil injection method. Oil is injected between the bearing and the 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 directly installing the bearing on the tapered journal, but it is also used to install the bearing on the adapter sleeve and push-off sleeve prepared for the oil injection method. The oil pump or oil injector generates the necessary pressure and injects the oil between the mating surfaces through the groove and the oil distribution channel on the shaft or sleeve. When designing the bearing layout, the necessary grooves and channels must be considered on the shaft. The spherical roller bearing is installed on the withdrawal sleeve with an oil groove, and the withdrawal sleeve is pressed into the bearing hole by injecting oil into the mating surface and tightening the screws in turn.
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