Correct Disassembly And Replacement Of Ina BearingCorrect Disassembly And Replacement Of Ina Bearing
Correct Disassembly And Replacement Of Ina Bearing
2022年1月6日
Relevant Steps And Precautions For The Installation Of Koyo Imported Bearings
Relevant Steps And Precautions For The Installation Of Koyo Imported Bearings
2022年1月6日

Installation And Maintenance Method Of Timken Bearing

Installation 

Whether Timken bearing is installed correctly affects the accuracy, service life and performance. Therefore, the design and assembly department should fully study the installation of Timken bearing. It is hoped that the installation will be carried out according to the operating standards. Items of operating standards are usually as follows:

(1) Clean Timken bearing and bearing related parts

(2) Check the size and finish machining of related parts

(3) . installation

(4) Inspection after Timken bearing is installed

(5) . supply lubricant

It is hoped that the Timken bearing package will be opened just before installation. General grease lubrication, do not clean, directly fill with grease. For lubrication with lubricating oil, it is not necessary to clean in general.

However, Timken bearings for instrument or high-speed use shall be cleaned with clean oil to remove the rust inhibitor coated on Timken bearings. The bearing with rust inhibitor removed is easy to rust, so it can not be placed regardless. Furthermore, Timken bearings sealed with grease can be used directly without cleaning.

The installation method of Timken bearing varies according to the structure, fit and conditions of Timken bearing. Generally, because it is mostly shaft rotation, the inner ring needs interference fit. Cylindrical bore bearings are usually pressed in with a press or hot installed. In the case of taper hole, it can be directly installed on the taper shaft or installed with sleeve.

When it is installed on the shell, there is usually more clearance fit, and the outer ring has interference. It is usually pressed in by a press, or there is a cold shrinkage fit method for installation after cooling. When dry ice is used as coolant and cold shrinkage is used for installation, the moisture in the air will condense on the surface of Timken bearing. Therefore, appropriate anti rust measures are required.

Installation And Maintenance Method Of Timken Bearing

Cleaning of Timken bearing: when removing Timken bearing for maintenance, first record the appearance of the bearing, confirm the residual amount of lubricant, and wash the bearing after sampling the lubricant for inspection. As a cleaning agent, gasoline and kerosene are commonly used.

The removed Timken bearing shall be cleaned in coarse cleaning and fine cleaning. They shall be placed in the container respectively. First, put the metal mesh bottom so that the Timken bearing does not directly contact the dirt of the container.

During rough cleaning, if the bearing rotates with dirt, it will damage the rolling surface of Timken bearing, which should be paid attention to. In the coarse cleaning oil, use a brush to remove the grease and adhesion. After it is roughly clean, turn to fine cleaning.

Fine cleaning is to carefully clean Timken bearing while rotating in cleaning oil.

In addition, the cleaning oil should also be kept clean. Maintenance and judgment of Timken bearing: in order to judge whether the disassembled Timken bearing can be used, it shall be checked after the bearing is cleaned.

Check the state of raceway surface, rolling surface and mating surface, wear of cage, increase of Timken bearing clearance and damage irrelevant to the decline of dimensional accuracy. For non separable small ball Timken bearing, support the inner ring horizontally with one hand and rotate the outer ring to confirm whether it is smooth.

Tapered roller bearing and split Timken bearing can check the raceway surface of rolling element and outer ring respectively.

Since large bearings cannot be rotated by hand, pay attention to the appearance of rolling elements, raceway surfaces, cages, edge retaining surfaces, etc. the higher the importance of Timken bearings, the more careful the inspection is.

. Loosen the bolts fixing the bearing pedestal. Remove the bearing together with the bearing pedestal from the shaft. Before removing the bearing seat at one end of the shaft, loosen the bolts of the bearing seat at the other end of the shaft to avoid damage to the bearings at both ends.

First loosen the locking screw on the bearing eccentric sleeve with an Allen wrench, then insert a small iron rod into the counterbore on the top cover eccentric sleeve, and loosen the eccentric sleeve against the rotation direction of the shaft.

Many people use improper installation methods in the installation of IKO imported bearings, resulting in bearing damage. So how to install the bearing correctly? I hope you can have a more comprehensive understanding of the installation and disassembly of bearings:

For bearing rings with clearance fit, it is recommended to apply a thin layer of anti creep corrosion agent on the mating surface to prevent friction corrosion between the mating surfaces.

390000 series outer spherical bearings fix the bearing inner ring and the shaft through the eccentric sleeve, and the hexagon socket screw on the eccentric sleeve plays a fastening role. During maintenance, many operators cannot disassemble this bearing, so it is necessary to introduce the technical points and precautions for disassembling 390000 series outer spherical bearing:

Correct installation is very important for the use of IKO imported bearings. I hope you can use the correct installation method in the future.

During installation, mechanical, heating or hydraulic methods can be selected according to its type and size. The force exerted on the bearing during installation must not be transmitted from one bearing ring to another through the rolling element, otherwise the raceway may be damaged. However, under no circumstances should the bearing ring, cage, rolling element or seal be directly knocked.