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Features Of SKF Bearing Cage

Source:  skf bearing  Time:  2020-09-07

     Imported SKF bearings 21317 EK (especially rolling bearings) are of two types with cage and without cage. Among them, the large-scale SKF imported bearings are generally required to withstand larger loads, often without a cage, but filled with rolling elements between the inner and outer raceways. Most of the small and medium rolling bearings are equipped with cages.

     In the processing process of SKF imported bearings, how are the outer ring, inner ring, rolling element and cage of the bearing assembled together? To put it simply, first put the inner and outer rings of the SKF imported bearing, put the inner ring aside, then put the rolling elements (set aside), then adjust the position of the rolling elements, and finally, put the cage. Now everyone knows that the cage is also involved in the processing of the bearing. So what is the main role of the bearing cage?


The role of the cage is:

1. Guide and drive the rolling elements to roll on the correct raceway;

2. The cage separates the rolling elements at equal distances and is evenly distributed on the circumference of the raceway to prevent collision and friction between the rolling elements during work;

3. In the separable bearing, the rolling element and a ferrule are combined to prevent the rolling element from falling off.

     SKF imported bearings are called windows, which are used to isolate and guide the rolling elements. The pocket gap allows the cage to have a certain amount of movement in the radial and axial directions, and the total amount of movement in the radial direction is called the cage clearance. The roller cage has a variety of structural types and complex shapes. There are many equidistant pockets on the cage. The shapes of the pockets are spherical, round, elliptical, rectangular and toothed. The size is larger than the size of the rolling element. The difference between the two is the pocket gap. The connecting part between is called the lintel, which plays the role of connecting and increasing the strength of the cage.


The main points of good bearing:

     SKF imported bearing is a kind of precision mechanical support element. Bearing users deeply hope that the bearing installed on the main engine will not be damaged and maintain its dynamic performance during the predetermined service period. However, the objective facts are sometimes not satisfactory. Suddenly SKF Failure of imported bearings will cause heavy losses to users. A large number of failure analysis studies of rolling bearings have shown that bearings have short life or premature loss of accuracy, some of which are caused by material defects or improper manufacturing, but to a large extent, they are not installed and maintained in strict accordance with the requirements of SKF imported bearings. , Or the improper selection of SKF imported bearings or the actual load exceeding the rated load of the SKF imported bearings themselves, etc., caused abnormal damage to the SKF imported bearings. SKF Bearing 21317 EK online, click here for more details.


The early failure modes of rolling bearings mainly include rupture, plastic deformation, wear, corrosion and fatigue. Under normal conditions, they are mainly contact fatigue. In order to better use SKF imported bearings, the following points should be noted:

Preparation before installation

1. Selection and requirements for installation site

    The installation site should be some distance away from lathes, grinders and other mechanical equipment. The site should be cleaned up and kept dry and clean to prevent iron filings, sand, dust, and moisture from entering SKF imported bearings.

2. Check the type of SKF imported bearings and prepare installation tools

    Inspect whether the bearing type and size meet the installation requirements, and select the appropriate assembly method according to the structural characteristics of the SKF imported bearing and the various parts that cooperate with it, and prepare the tools and measuring tools for installation. Commonly used installation tools include hand hammers, copper rods, sleeves, special backing plates, screw clamps, presses, etc., with vernier calipers, micrometers, and dial indicators.

3. Inspect the bearing assembly surface

    If there are bumps, rust layers, abrasive particles, sand, dust and soil on the assembly surface of the imported SKF bearing and the surface of the matching parts, one is difficult to install the bearing and the assembly position is incorrect; the other is that these attachments form abrasive , It is easy to wear and damage the working surface of the bearing, which affects the assembly quality. Therefore, the shaft journal, the surface of the housing hole of the bearing housing, the end face of the shoulder, and the mating surface of the connecting parts such as bushings, washers, and end covers should be carefully inspected before installation. If there is a rust layer, it can be filed off with a fine file and polished with a fine emery cloth. At the same time, the attachments on the assembly surface of the SKF imported bearing and its connecting parts should be removed.We provide SKF Bearing 63008-2RS1, contact us to buy it.


Precautions for the use of SKF imported bearings:

    Rolling bearings are precision parts, and their use must be carried out accordingly. No matter how high-performance SKF imported bearings are used, if they are used improperly, the expected high performance will not be obtained. Precautions concerning the use of bearings are as follows:

    ⑴. Keep SKF imported bearings and their surroundings clean. Even small dust invisible to the eyes can affect the bearing. Therefore, keep the surroundings clean to prevent dust from entering the bearing.

    ⑵. Use it carefully. A strong impact on SKF imported bearings during use will cause scars and indentations, which will cause accidents. In severe cases, it will crack or break, so be careful.

    ⑶. Use appropriate operating tools. Avoid replacing with existing tools and must use appropriate tools. Such as special sleeves, presses, etc.

    ⑷. Pay attention to the corrosion of SKF imported bearings. When handling bearings, sweat on your hands can cause rust. Pay attention to the operation with clean hands, it is best to wear gloves as much as possible.

    ⑸. Before the installation preparation work is completed, do not open the packaging of SKF imported bearings to avoid contamination.