Bearing installation is good or bad, will affect the bearing accuracy, life expectancy and performance. Therefore, please fully consider the installation of the bearing, that is, please follow the operation standards including the following items for bearing installation.

1. Clean the bearings and related parts, (for grease-lubricated bearings and double-sided oil seals or dust caps, seal bearings need not be cleaned prior to installation.)

2. Check the size of the relevant parts and finishing conditions

3. Installation method

Bearing installation should be based on bearing structure, size and bearing components with the nature of the fit, the pressure should be added directly to the tight fit of the ferrule end face, not through the rolling body transmission pressure, the bearing installation generally adopts the following method:

a. Press fit

Bearing inner ring and the shaft is tight fit, the outer ring and the bearing seat hole is loose fit, the press can be used to press the first bearing mounted on the shaft, and then the shaft together with the bearing into the bearing hole, Bearing inner ring end face, pad a soft metal material to do the mounting sleeve (copper or mild steel).

Bearing outer ring and bearing housing tight fit, the inner ring and the shaft is loose fit, the bearing can be pressed into the bearing seat hole, then the outer diameter of the assembly sleeve should be slightly smaller than the diameter of the seat hole.

If the bearing ring and the shaft and seat hole are tight fit, the installation of the inner ring and the outer ring to be pressed into the shaft and the seat hole at the same time, the assembly of the sleeve structure should be able to simultaneously hold the bearing inner ring and outer ring end.

b. Heating Fitting

By heating the bearing or housing, the use of thermal expansion of the tight fit into a loose fit installation method. Is a common and labor-saving installation method. This method is suitable for the installation of bearings with a large amount of interference, the bearing or separable bearings before hot-filled bearing ferrule into the tank evenly heated 80-100 ℃, and then removed from the oil as soon as possible to the shaft, as After cooling to prevent the inner surface of the inner ring and shoulder fit tight, the bearing can be cooled after axial fastening. Bearing outer ring and light metal bearing with a tight fit, the use of heated bearing seat method of hot, you can avoid the mating surface by scratches.

When heating the bearing with fuel tank, there should be a grid at a certain distance from the bottom of the tank, or the bearing should be hung with a hook, the bearings can not be placed on the bottom of the tank, so as to prevent impurities from entering the bearing or uneven heating. The tank must have a thermometer, Strict control of the oil temperature shall not exceed 100 ℃, to prevent the tempering effect, reducing the hardness of the ferrule.

c. Thrust Bearing Installation

Thrust bearing shaft and shaft with the general transition fit, seat and bearing seat hole with the general clearance fit, so this bearing easier to install, two-way thrust bearing shaft ring should be fixed on the shaft to prevent Rotate relative to the axis.

Bearing installation method, under normal circumstances is the majority of shaft rotation, so with the inner ring and the shaft for over-win with the bearing outer ring and the bearing chamber with the clearance fit.

Bearing check

After the end of the bearing installation should be immediately checked the operation has been installed to determine whether the normal.