The amount of material loss due to wear is called the amount of wear. This can be obtained by measuring changes in length, volume or mass and equating them as wire wear, volume wear and mass wear.
The finished nsk bearing ring cannot exist in the case of grinding burns and grinding cracks, especially on the mating surface of the inner ring taper. If the ferrule is pickled, it should be fully inspected and the burned product should be removed. If the burn is not repaired or the repair is unqualified, it should be scrapped. It is not allowed to wear the ferrule for grinding burns into the assembly process. Before the steel is put into storage and before the ferrule is ground, each process must be strictly managed, and the two different materials and products of GCr15 and GCr15SiMn should be strictly distinguished.
Whether it can be judged that the nsk bearing is the degree of damage according to various needs, the main consideration is the effect of the damage, the mechanical performance, the importance, the installation conditions are all considered, and the next maintenance period The effect of the decision. But when the loss can no longer be used, it must be replaced with a new one. Attention should be paid to cracks on any of the inner ring, the outer ring, the rolling elements, and the cage.
After rolling the nsk bearing, plastic deformation occurs at the contact between the rolling element and the raceway after the load is applied. When the load is too heavy, plastic deformation pits are formed on the surface of the raceway, so that the nsk bearing generates vibration and noise during operation.
When the relative movement of the rolling elements and the raceway and the intrusion of dirt and dust, the rolling elements and the raceway surface are subject to wear. If the amount of wear is large, the bearing clearance, noise, and vibration will increase, which will reduce the running accuracy of the nsk bearing, which will directly affect the accuracy of some mainframes.
Therefore, for some nsk bearings, especially for precision machinery, the wear amount can be used to evaluate the life of the nsk bearing.