Angular contact ball bearing installation method and steps

Anyone who knows bearings knows that the installation technology of angular contact ball bearings is more complicated than that of deep groove ball bearings, and they are mostly installed in pairs, requiring preload. 

Whether the installation method of the angular contact ball bearing is correct will affect the accuracy, life and performance of the bearing. 

After installation, the action accuracy and bearing life of the main engine can be greatly improved; otherwise, not only the required accuracy will not be met, but the life will also be affected. Then, let’s learn about the installation methods and steps of the lower angular contact ball bearing!

Because it is a single row angular contact ball bearing, it can only bear the thrust in one direction. In order to be able to withstand bidirectional axial force, a combination of at least two rows of bearings is required. 

In order to increase the axial load in a single direction, at least two rows of bearings need to be combined in series, so angular contact ball bearings need to be installed in pairs.

When installing angular contact ball bearings, pay attention that the bearing ring can adapt to the rolling of the rolling elements, and ensure that the rolling elements are on the upper and lower ring tracks. The installation method of paired angular contact ball bearings is as follows.

1. Generally, the plug gauge inspection method is used to check. The angular contact ball bearing with a larger diameter has a very large gap and is directly measured with a narrow plug gauge.  

For the angular contact ball bearing with a small diameter, the gap is very small, and there is no need to measure it with a ruler. Measure the clearance of angular contact ball bearings with a thickness gauge.

2. Another method is to push the lead and measure the clearance of the angular contact ball bearing. Using a ruler is very labor-intensive, so in practice, soft lead wire is usually used for measurement. The soft lead wire used is very soft and should not be too long or too small in diameter. The ideal is 1.5-2 times the gap.

When checking, first open the angular contact ball bearing cover, selects a suitable soft iron wire, cut it short and place it on the interface between the bearing journal and the upper and lower bearings, cover the bearing cover, tighten the bolts, unscrew the bearing cover, 

and measure the thickness of the flattened iron wire with a micrometer If the order gap is too small, house pads can be placed on the joint surfaces of the upper and lower tiles, and when the gap is too large, the pads can be reduced or the tiles can be re-watered.

When using this assembly method for angular contact ball bearings, please pay attention:

1.Check the verticality of the shaft collar and the center line of the shaft. The method is to fix the dial indicator on the end face of the casing, and use the head of the dial indicator to lean against the shaft ring track of the bearing to rotate the bearing, and observe the pointer of the dial indicator at the same time. 

When the needle shakes, it means the collar is not perpendicular to the centerline of the shaft. A long dial indicator can also be used to check if the hole in the housing is deep.

2.When installed correctly, its seat ring automatically adapts to the rolling of the rolling elements, ensuring that the rolling elements are generally located on the upper and lower wheel tracks. On the contrary, not only the bearing cannot operate normally, 

but also the joint surfaces are seriously worn. The difference between the color and the toilet seat is not obvious, so be very careful when assembling it, don't make a mistake.

3. There is a gap of 0.2-0.5 mm between the bearing collar and the bearing seat hole to compensate for errors caused by inaccurate parts processing and installation. When the center of the bearing ring is offset during operation, this clearance will automatically adjust to allow it to operate normally without contact friction. Otherwise, the bearing will be seriously damaged.

4.Please check whether the bearing housing is clean and worn before installation. Also, please install the bearing, press the end cap, check the flexibility of the east winding, and don't forget that the whole part is installed on the lead screw. 

If the end cap is pressed down after the lead screw is installed, it may cause the bearing to not know the position, get stuck, and heat up easily.

5. The other is that there are marks of v and 0 on the bearing. This should be installed where the bearing accuracy is high and the bearing box printing run out is large. Through this combination, the error of the workpiece can be compensated, and the rotation accuracy can be dynamically balanced.

After the installation of the angular contact ball bearing and the inspection, if there is no abnormal angular contact ball bearing, it will operate normally.

The above is the installation method and steps of angular contact ball bearing. If you need to know more, please feel free to contact us!