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Run a rolling bearings cannot continue indefinitely, and in operation process, causes bearing damage due to various reasons. Improper installation, poor lubrication, water and dust intrusion, corrosion, Galvanic corrosion can cause premature bearing damage. Installation, lubrication, maintenance, under normal circumstances, a certain amount of time after the operation, fatigue spalling can also occur, wear and bearing is not working properly.
Main failure types of rolling bearings are as follows:
1. fatigue spalling
Rolling bearings, loading surface contact and relative movement (or the rolling surface of the Raceway), due to repeated loading conditions, first of all, under the surface, depth, strength the weaker part of the formation of cracks. Then developed to the contact surfaces, surface metal piece comes off, they should not be working properly, a phenomenon known as fatigue spalling. Rolling bearing fatigue spalling is eventually inevitable, in fact in the case of installation, lubrication and sealing properly, the vast majority of bearing damage is fatigue. Generally referred to as bearing life, refers to bearing fatigue life.
2. plastic deformation (permanent deformation)
After loading rolling bearings, plastic deformation at the rolling element and the Raceway contact. Load heavy, pits of Raceway surface plastic deformation and severe vibration and noise generated in the bearing in operation.
Outside durum into the bearing can also be formed in the contact surface indentation. In addition, excessive shock loads or when the bearing is stationary, with machinery formed pit vibration and other factors will make contact. Qualified permanent deformation quantity of licenses to decide bearing in bearing static load capacity.
3. wear
Due to the relative motion of the rolling element and the Raceway and dirt dust intrusion, the rolling element and the Raceway surface wear. When a large amount of wear and increased bearing clearance, noise, vibration, reducing the running accuracy of the bearing, thus directly affecting the precision of the host. Some bearings used in precision machinery, qualify the bearing life can wear.
These three failure modes are common forms of major damage. There are many other forms of damage, such as the rings break, rolling crush, cage wear and fracture, current through the formation of galvanic corrosion, rust, etc. But these forms has a chance, with a number of factors. In the case of installation, lubrication, maintenance, normal, these forms of damage can be avoided.
Against three main rolling bearing failure modes are available through the following channels: fatigue failure can be qualified by the dynamic load rating of their carrying capacity; plastic deformation can be qualified with a static load rating of its load-bearing capacity; wear by qualifying its wear sizes to determine their load capacity.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NN3022MBKRCC1P4 NSK | 110 | 170 | 45 |
| NN3021TBKRCC1P4 NSK | 105 | 160 | 41 |