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Matched bearing rings and other components, because of the relative sliding with the Department, causing friction fever, generate heat cracks, in case an external shock load, the bearing prone to fracture. Prevent bearing rings relative sliding due to damage to the mating surface of the measures are: use the appropriate amount of interference, to prevent sliding mating surface materials and the use of hardened steel bearings. Such as checking the bearing mating surface, you will find a significant slide scuff marks. Due to the relative sliding bearing mating surface breaking cracks generated in the vicinity of significant fine cracks (called thermal cracking), as a method to check corrupted acid bearing, in the vicinity of cracks at the both sides of the material will find that there are different degrees of decarbonization and burns.
Iron critical humidity 65%, about 65% of aluminum, about 65% of aluminum, zinc and 70% within the warehouse so the bearing should not exceed 60% relative humidity. In the case of normal fatigue spalling damage, you should have a plan to replace the bearings, and prevent fatigue spalling caused by bearing fracture accidents. Thermal cracks often thrown in the rolling mill roll neck bearings and the inner parts of the face.
Bearing move work surface fatigue spalling damage, such as premature thrown before the bearing life calculation, you should consider whether the actual load bearing too, bearing selection whether it is fair and so on. Bearing in the atmosphere corrosion speed and relative humidity not actually straight linear relationship, the relative humidity is low corrosion of the bearing is slow, but when the relative humidity increases to a certain value or more, corrosion rate increased only occur Passed , when the relative humidity value is called the critical moisture.
Bearing rust work is bearing an important part of the Treasury governance, practice showed that the majority of libraries bearing corrosion and rust working poor are related. If the atmosphere contains impurities such as coal particles, sand, dusty, will reduce the surface tension of the dew condensation, to promote the formation of a water film or thicker. When the bearing temperature decreases the warehouse or the humidity increased, the atmospheric moisture will be in the form of dew condensation packaging material bearing or bearing surface, forming a thin film of water (also known as wet film). Many types of corrosion of bearings, which generally is the most important atmospheric corrosion.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 4T-15117+/15245 NTN | 29.987 | 62 | 20.638 |
| 4T-17118+/17244 NTN | 29.987 | 62 | 16.566 |