The effective contact fatigue of the outer spherical bearing with the seat is the effect of the alternating stress on the bearing working name, and the deep peeling is the internal cause of the effective contact fatigue. Spherical roller bearings are assembled with drum-shaped roller bearings between the inner ring with two raceways and the outer ring with spherical raceways. Spherical roller bearings have two rows of rollers, which mainly bear radial loads, but can also bear axial loads in any direction. With high radial load capacity, it is especially suitable for working under heavy load or vibration load, but it cannot bear pure axial load. The outer ring raceway of this type of bearing is spherical, so its alignment performance is good, and it can compensate the concentricity error.

We know that contact fatigue spalling occurs in the working name of the outer spherical bearing with a seat, and is often accompanied by fatigue cracks. First, it occurs from the maximum alternating shear stress below the contact name, and then expands to form different spalling shapes, such as dots. Pitting or pitting peeling, peeling into small flakes is called shallow peeling. Because of the gradual expansion of the spalling surface, it often expands to the deep layer, forming deep spalling.

Abrasion effect refers to the effect that the sliding friction between the names causes the nominal metal of the working name to be worn out all the time. Spherical roller bearings are assembled with drum-shaped roller bearings between the inner ring with two raceways and the outer ring with spherical raceways. Spherical roller bearings have two rows of rollers, which mainly bear radial load, but can also bear axial load in any direction. With high radial load capacity, it is especially suitable for working under heavy load or vibration load, but it cannot bear pure axial load. The outer ring raceway of this type of bearing is spherical, so its alignment performance is good, and it can compensate the concentricity error.

Continuous wear will cause the gradual destruction of the bearing machine, and ultimately lead to the loss of bearing dimensional accuracy and other related problems. Tapered roller bearings are separable bearings. Both the inner and outer rings of the bearing have tapered raceways. This type of bearing is divided into single-row, double-row and four-row tapered roller bearings according to the number of rows installed. Wear may affect the shape change, the increase of the matching gap and the change of the nominal shape of the work, may affect the lubricant or make it contaminate to a certain level, causing the lubrication function to be completely lost, so that the bearing loses rotation accuracy and even cannot run abnormally. Wear effect is one of the common effective modes of various bearings. According to the wear situation, it can usually be divided into the most common abrasive wear and adhesive wear.