Cross Cylindrical Roller Bearing Installation Method and Precautions

Crossed cylindrical roller bearing is a common rolling bearing, which is widely used in all walks of life. Crossed roller bearing is also a consumable, because incorrect installation or operation will affect its service life, and in serious cases, it will lead to bearing failure. If it is damaged, the bearing has to be replaced in time to make the equipment run normally. Below, the manufacturer of the crossed cylindrical roller bearing will introduce the correct installation method and precautions of the crossed cylindrical roller bearing!

Installation steps of crossed cylindrical roller bearings

1. Check before installation

Thoroughly clean the spindle, bearing housing or other mounting parts, remove oil or impurities, and check for burrs or burrs. After confirmation, the spindle, housing and components are ready to start installation.

2. Install the bearing

When the crossed cylindrical roller bearing is installed in the shaft or the bearing housing, because it is a thin-walled bearing, it is easy to tilt during installation. In order to prevent this phenomenon, it is necessary to use a plastic hammer evenly while keeping it level, and carefully install the crossed cylindrical roller bearing into the bearing housing or the shaft little by little until it is confirmed by sound that it is completely abutted with the reference surface. until.

3. Mounting flange

(1) Place the fixing flange on the crossed cylindrical roller bearing and shake the fixing flange several times to match the position of the bolt holes.

(2) Insert the fixing bolts into the holes and turn the bolts by hand to confirm that the bolts are not difficult to screw in due to the deviation of the bolt holes.

(3) The locking of the fixing bolts can be divided into 3-4 stages from incomplete locking to full locking, and they are repeatedly tightened in the order on the diagonal. When tightening the inner or outer ring of the split body, the deviation of the inner and outer rings from the main body can be corrected by slightly turning the whole outer or inner ring.

Precautions for installation of crossed cylindrical roller bearings

1. Tolerance control

After the crossed cylindrical roller bearing is pressed into the bearing, it should rotate flexibly without any sense of blockage. If the rotation is obviously inflexible, it indicates that the size of the shaft is too large and the tolerance should be reduced. If the imported bearing is pressed into the shaft and there is an obvious "sand" feeling when it is rotated by hand, it may be that the tolerance of the shaft is too large or the roundness of the shaft is not good.

2. Assembly method

Because the crossed cylindrical roller bearing is a high-precision product, it is easy to damage the bearing channel if it is improperly assembled, resulting in bearing damage. The crossed cylindrical roller bearing should have a special mold when assembling, and can not be beaten at will. When pressing into the shaft, only a small circle can be stressed, and when a large circle is pressed, only a large circle can be stressed.

3. The rotor is unbalanced

When the crossed cylindrical roller bearing is installed on the rotor for dynamic and static balance, it is easy for the generated iron filings to enter the inside of the bearing, so it is better to do dynamic and static balance before installing the bearing.

4. Control lubricating oil

During assembly, the staff will apply grease in the bearing chamber to achieve a lubricating effect, but if the amount of use is not well controlled, it will lead to excessive accumulation of grease in the bearing chamber, and it is easy to enter the bearing when the crossed cylindrical roller bearing rotates. Therefore, the bearing chamber should not be coated with oil or grease. If coating is necessary, it must be controlled that there is no accumulation in the bearing chamber.

5. Prevention of paint rust

The characteristic of paint rust is that it mostly occurs in the sealed motor. The motor has a good sound during assembly, but after being placed in the warehouse for some time, the abnormal noise of the motor becomes very large, and the bearing is seriously rusted after removing it. In the past, many manufacturers thought it was the bearing problem. After continuous publicity, the motor factory has now realized that the main problem is the insulating paint. Therefore, it is necessary to choose a good quality insulating paint, and then assemble it after drying and ventilation.

The above describes the installation method and precautions of the crossed cylindrical roller bearing in detail. In order to ensure the service life of the crossed cylindrical roller bearing, it is necessary to do the correct installation, and pay attention to the assembly method and tolerance during installation. Control and lubrication control details.