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Due to different single direction bearings provide a variety of materials, production process and coating capabilities and equipment, so people in the selection of SKF bearings should be applied according to the specific requirements when selecting the most suitable. Embedded in the rolling bearing-contact seals, also have significant impact on the performance and reliability of the bearings, to itself the FAG bearing performance and may have a large impact. General consideration for bearing rings and rolling elements include: hardness in relation to carrying capacity, under different cleanliness and rolling contact fatigue resistance, lubrication, and dimensional stability.
Relevance of material is still one way bearing failure analysis on the factors that must be considered. NSK bearing failure analysis of main tasks, is based on a great deal of background material, analysis of data and failure modes, identify the main factors contributing to failure so that targeted measures for improvement, and extended bearing service, avoid unexpected early bearing failure. Installation conditions is one of the leading factors in the use, the bearings are installed are not suitable, they result in packages bearing stress changes between the various parts of, in a State of abnormal functioning of the bearing and early failure. According to bearing technical requirements for the installation, use, maintenance, servicing, in operation of the TIMKEN bearing to withstand the load, speed, temperature, vibration, noise monitoring and inspection and lubrication, unusual now to find reasons to adjust, bring it back to normal.
Both have advanced reasonable structure design, one-way bearing will have a longer life expectancy. INA bearing generally after forging, heat treatment, machining, grinding and assembling multiple processes. Rationality, advanced processing technology, also affects the stability of the bearing life. Which affect the finished quality of bearing heat treatment and grinding operations, often has a direct relationship with the bearing failure. Bearings on the bearing surface degenerating layer of research in recent years indicated that close to grinding and surface quality of bearing.
One way bearing the metallurgical quality of the material was the main factors affecting the early failure of KOYO bearings. As metallurgy technologies (such as vacuum degassing of steel bearing) advances, improvements in the quality of raw materials. Raw material quality factor's share in bearing failure analysis has already been reduced significantly, bearing but it remains one of the main factors affecting the bearing failure.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NNU4972 NTN | 360 | 480 | 118 |
| NNU4968K NTN | 340 | 460 | 118 |