A key step in installation of imported bearings

Frequently used bearing friends all know, good or bad imported bearings installed or not, will affect the accuracy of the bearing life and performance. Therefore, to fully study the installation of bearings, that contains the following items, follow the steps, including bearing installation.
         1, cleaning bearings and related components that have grease lubricated bearings and seals, or bilateral with dust cover, seal bearings do not need cleaning prior to installation.
         Second, check the relevant parts of the size and finishing conditions.
         3, the installation method to install the bearings should be based on bearing structure, size and bearing components with the nature of the pressure should be directly added to the tight end to co-ordinate ring surface, the pressure can not pass through the rolling bodies, bearing installation generally use the following methods:
         a. press-fit bearing inner ring and the shaft so tight coordination with the bearing outer ring is more loose with the hole when the bearing can be pressed presses will be installed in the shaft, then shaft with bearings into bearing with the hole , press-fit bearing inner ring-side at the surface, a soft pad made of metal materials, the assembly of casing (copper or soft steel), the assembly of casing diameter should be slightly larger than the journal diameter, outer diameter than the bearing inner ring diameter should be blocked edges slightly smaller in order to avoid pressure in maintaining the shelves. Bearing outer ring and the bearing hole tight fit, the more loose inner tie in with the shaft, can be pressed into the bearing seat bearing the first hole, when the diameter of casing assembly seat should be slightly less than the diameter of the hole. If the bearing race seat with the shaft and the hole are the tight fit, the installation of interior circle and outer circle the same time pressed into the shaft and seat hole, the assembly structure of the casing should be able to charge the same time, tight bearing inner and outer rings of the face.
          b. heating with the heat bearing or bearing through the use of thermal expansion will be tight fit into a song with the installation method. Is a commonly used and labor-saving installation method. This method suitable for large amount of interference the installation of bearings, thermal loading before separable type bearings bearing rings into the fuel tank in the uniform heating 80-100 ℃, and then remove from the oil loaded into the shaft as soon as possible, in order to After cooling to prevent the inner face and shaft shoulder fit is not tight, the bearings can be cooled further axial fastening. Bearing outer ring and light metal bearing seat tight fit, the use of heating bearing thermal loading method, can be avoided with the surface by abrasion. Heating bearings with the fuel tank when a certain distance away from Xiangdi should be a grid, or by hanging hook bearing, bearings can not be placed on the Xiangdi to prevent impurities entering the bearing Shen or uneven heating, tank must have a thermometer, strictly control the oil temperature should not exceed 100 ℃, in order to prevent the occurrence of backfire effect, so that the hardness of reduced rings.
          c. the installation of tapered bore bearings tapered bore bearings can be directly mounted on a taper of the journal, or load tight set kits and sets back unloaded on a cone, its tight or too loose with the bearing radial clearance can be used to reduce the amount of measure, and therefore should be measured before installation bearing radial clearance, the installation process should always be measured clearance in order to achieve the required clearance reduce the amount of date, has generally adopted a locking nut to install the installation, heating installation methods can be used also .
          d. the installation of thrust bearing thrust bearing and the shaft with the general well-transition co-seat ring with the bearing hole with the generally clearance fit, so the bearings easier to install, bi-directional thrust bearing of the axial spring in the shaft should be on a fixed, in order to prevent rotation relative to the axis. Bearing installation method, under normal circumstances is the axis of majority, therefore co-ordination of the inner shaft too win tie, bearing outer ring and bearing chamber with the clearance fit. 4, bearing the inspection after installation of five, lubricants Add.