Three main factors NSK bearing failure

1 contact fatigue failure of contact fatigue failure is refers to the NSK bearings work appearance by the effect of alternating stress and failure. Sliding bearing contact fatigue spalling attacks work in appearance, often also along with fatigue crack, first from the contact appearance under the maximum cyclic shear stress, and then extended to constitute different flake shape, appearance such as dot to pitting corrosion or pitting spalling, peel into small sheet according to the shallow flaking. Due to the expansion of peeling off surface gradually, and often to expand the deep, deep spalling. Deep spalling is contact fatigue failure of fatigue source. 2 NSK bearing clearance change failure at work, because of the influence of external or internal factors make the original fit clearance changes, lower accuracy, and form a 'killed' called clearance change failure. , large amount of the external factors such as interference of the device does not reach the designated position, provoked the shrinkage temperature, instantaneous overload, etc. , the internal factors such as residual austenite and the residual stress formed in a state of flux and so on all is clearance change main reason of failure. 3 wear failure wear failure refers to the relative sliding friction between the appearance from the work appearance of metal from time to time the wear failure. Continue to wear will make up the damage of bearing parts gradually, and ultimately cause sliding bearing size accuracy loss and other related problems. Wear may affect the appearance change, the increase of fit clearance and morphology change work appearance, may affect the smooth agent or allow its pollution to reach a certain level to form a smooth function complete loss, thus make the loss of bearing rotating accuracy and will not operate properly. Wear failure is one of the common failure forms of all kinds of bearings, according to the usual wear can be divided into one of the most common of abrasive wear and adhesive wear. First of all, reasonable structure design and equipped with advanced, just can have a long bearing life. NSK bearings manufacturing ordinary go through forging, heat treatment, turning processing, grinding and assembly process. The rationality of the processing technology, advanced, stability will also affect the service life of bearing. Which affects the quality of scrap bearing heat treatment and grinding process, often have a more direct relationship with bearing failure. Bearing of the bearing work appearance transformation layer in recent years, the research indicated, grinding process with close ties to the bearing surface quality. NSK bearing materials metallurgy quality were the main factors affecting the premature failure of the rolling bearing. As metallurgy technology, For example, the bearing steel vacuum degassing, etc. ) The progress of the original data quality improvement. The original data quality elements in bearing failure analyze the proportion of land had obvious, bearing but it is still one of the main influence factors of bearing failure.