Bearing installation knowledge

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Bearings installed good or bad, will affect the accuracy of the bearing, the life and performance. Therefore, fully research the installation of the bearings, the bearings

installed in accordance with the standards of operation, including the foll owing items.angular contact ball bearings
Cleaning bearings and related parts

Has grease lubricated bearings, bilateral with seals or dust cover, the seals bearing installation before without washing.

Second, check the relevant parts of the size and finishing conditions.cylindrical bearings

Third, the installation method

Bearing should be installed according to the bearing structure, size and bearing components with nature, pressure should be applied directly to the tight fit ferrule end face

shall not pass through the rolling pressure, the bearing installation generally use the following method:

a press-fit

Bearing inner ring with the shaft so that a tight fit, the outer ring and bearing holes than a loose fit, available presses the bearing pressure m ounted on the shaft, and the

shaft together with the bearing load bearing hole with press-fit in bearing inner ring end face, a soft metal material of the pad assembly sleeve (copper or soft steel) the

assembly casing diameter should be slightly larger than the journal diameter, outside diameter diameter should be slightly smaller than the bearing inner ring ribs to avoid The

pressure on the retainer. The bearing outer ring and bearing hole is a tight fit, the inner ring and the shaft for the bearing to be pressed into the bearing hole than loose

fitting, then assembled the outside diameter of the casing should be slightly smaller than the diameter of the housing bore. Ring and the outer ring of the bearing rings and the

shaft and the housing bore is a tight fit when installed indoor pressed into the shaft and the housing bore, to The assembly casing structure should be able to charge tight end

face of t he bearing inner ring and the outer ring.roller ball bearings

b heating with

Thermal expansion will be a tight fit to change by heating the bearings or bearing installation method is loose fitting. Is a common and effortless installation method. This

method is suitable for the installation of larger bearings of the amount of interference, before mounting the heat bearing or separable bearing the ferrule into the tank in the

uniform heating to 80-100 ° C, and then removed from the oil onto the shaft as soon as possible, in order to prevent cooling inner ring end face and shaft shoulder fit is not

tight, bearing cooling axial fastening. Bearing outer ring and light metal bearing is a tight fit, heating chock hot charging method, can be avoided with the surface by

abrasion. Heating bearings with fuel tank, from the bottom at a certain d istance should be a net gate, or hanging with hooks bearing, the bearing can not be put on the bottom to

prevent Shen impurities into the bearings or uneven heating, the tank must have a thermometer, strictly control the oil temperature shall not exceed 100 ° C in order to prevent

the backfire effect, reduce the hardness of the ferrule.

installation of c. tapered bore bearings

Tapered bore bearings can be mounted directly on a tapered journal, or loading of tight on the sleeve and the the withdrawal sleeve of cone, with the tightness can be used to

measure the bearing radial clearance reduction, therefore, before installation measuring the radial bearing clearance, the installation process should always measure up to the

amount of clearance in order to achieve the required reduction in clearance, commonly used in the installation locknut installation, heating installation methods can also be

used.

d. thrust bearing installation

The comprehensive thrust bearing and shaft with generally transition with seat bearing hole with clearance fit is generally easier to install this bearing, bi-directional thrust

bearing central axis of the spring should be fixed on the shaft to prevent relative on the shaft is rotated. Bearing installation method, under normal circumstances, the axis of

rotation of the majority, and therefore for the inner ring and shaft with win with the bearing outer ring of the bearing chamber with clearance fit.