Damage state: It shows a dark surface with slight abrasion. There are many tiny cracks on the dark surface that are as deep as 5-10m in the surface, and tiny shedding (small peeling) occurs in a wide range.
Cause: The lubricant is not suitable. Foreign matter enters the lubricant. Poor lubricant causes a rough surface. The surface finish of the paired rolling parts is not good.
Action: Select a lubricant to improve the seal to improve the surface finish of the paired rolling parts.
Damage state: The so-called card injury is a surface damage caused by a combination of minute burns generated in a sliding surface injury. Linear flaws in the circumferential direction of the slide surface and the rolling surface. The tangential flaw of the roller end face is close to the jamming of the collar surface of the roller end face.
Cause: Excessive load, excessive preload. Poor lubrication. Foreign body bites into it. The inclination of the outer ring of the inner ring and the deflection of the shaft. The accuracy of the shaft and SKF Tilting pad journal bearing housing is poor.
Action: Check the size of the load. Preload should be appropriate. Improve lubricants and lubrication methods. Check the accuracy of the shaft and SKF bearing housing.
Damage state: The so-called fracture refers to a small portion of the fracture due to the application of a musical impact or an excessive load to a part of the rim or the roller angle of the race wheel.
Cause: The installation was hit. The load is too large. Poor use, such as dropping.
Action: Improve the installation method (hot pack, use the appropriate tool holder). Correct the load conditions. The SKF bearing is mounted in place to support the ribs.