The cage in the rolling bearing plays a role in equidistant isolation of the rolling body and prevents the rolling body from falling, guiding and driving the rolling body to rotate. Generally speaking, under reasonable working conditions, the cage will not be damaged, but the wrong operation in daily production will reduce the service life of the bearing cage. Common cage failure phenomena are: cage broken, rivets loose or broken, cage fracture, rolling body scattered. So, what are the causes of the fracture of the thin-walled bearing cage of equal cross-section?

1、Lubrication is not in place

Bearing in the operation of the work, if the lubrication work is not well will affect the normal operation, so be sure to ensure that the lubricating oil is sufficient, enough bearing use, if the lubricating oil is not enough, then it will make the thin-walled bearing of equal cross-section in the state of poor oil, so that it will be easier to form the bite wear, so that the working surface condition will deteriorate, so that the bite wear of the tear will enter To the cage, so that the cage to produce abnormal load, so that it may cause the cage fracture.

2. Abnormal cage load

When the cage in the installation of the problem, such as installation is not in place, tilt, too much interference, etc.. It will be easier to cause clearance reduction, thus intensifying the friction heat when using, softening the surface, premature abnormal flaking, with the expansion of the flaking, flaking foreign body into the keep frame pocket hole, resulting in the keep frame running block and generate additional load, intensifying the wear of the keep frame, so the deterioration of the cycle of action, it may cause the keep frame fracture, and thus scrap.

3, such as cross-sectional thin-walled bearing cage with foreign body invasion

In fact, the intuitive reason for the fracture of the cage, is because the cage in the foreign body, once the foreign body will affect the operation of the cage, especially some hard foreign body, will intensify the wear of the cage to produce abnormal additional load, so that it may cause the cage to fracture.

4、Creep phenomenon

Creep phenomenon is also one of the reasons for the fracture of the cage. The so-called creep refers to the sliding phenomenon of the collar, in the case of insufficient interference with the surface, due to sliding and the load point to move in the direction around, resulting in the collar relative to the shaft or shell to the circumference of the position deviation phenomenon. Creep once generated, with significant wear surface, wear powder is likely to enter the thin-walled bearings of equal cross-section inside, the formation of abnormal wear, raceway flaking and keep frame wear and additional load process, and may cause keep frame fracture.

5, keep frame quality is too poor

The quality of the cage is also affected by the use, if the quality is very poor, then in the process of using the wear and tear may occur fracture, especially in the case of cage defects are more likely to fracture, common defects are: cracks, large foreign metal inclusions, shrinkage, bubbles, or riveting defects lack of nails, pad nails or two halves of the cage combined surface gap, serious riveting injuries, etc., these The situation is likely to cause the cage fracture.

The above is the analysis of the reasons for the fracture of the thin-walled bearing cage, in fact, there are many reasons for fracture, such as when the bearing vibration, inertia force can be large enough to cause fatigue cracks, these cracks over time will also lead to keeper fracture. If the bearing runs more than the design speed of the cage, the inertia in the cage may also lead to cage fracture.