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Bearing working, rolling elements and inner ring (or outer ring) the load is not constant, but as the operation cycle changes. This load is alternating loads and due to the rolling elements and the inner ring (or outer ring) a small contact area, contact stresses are greater at higher speeds, huge changes under the influence of contact stress repeatedly, metal fatigue occurs. Began, in stress set of parts produced visible tiny crack, due to lubricant of role and metal of corrosion, makes crack gradually expanded, dang expanded to must degree Shi, surface metal will will produced peeling, formed small printing hang, similar Ma points, we in split checked Shi, will often found within or outer ring and the scroll body surface has Ma points and a block metal peeling, this is metal fatigue peeling of phenomenon.
Bearing fatigue spalling in bearing a long time after the operation, shall be considered as natural damage, if you use medium or early bearing, shall be considered as non-natural peeling, then, should identify the causes of peeling.
Non-bearing type is mainly because of natural flaking caused by improper or due to improper installation.
Due to bearing type of flaking caused by poor choices in the case of a large axial load selection of deep groove ball bearings, there may be early flaking. Spalling occurs mainly in the Raceway, it makes rolling the scroll track ball moves, or even scroll off the ball, finally Raceway severe spalling damage occurred. Measures to prevent such damage is select a bearing by bearing condition is reasonable.
Vibrations on the bearings of the injury can be said to be quite sensitive to indentation, corrosion, cracking, spalling, and wear are reflected in vibration measurements. Therefore, through the use of special measuring bearing vibration (frequency Analyzer) vibration size can be measured through frequency not infer exceptions in specific situations. Measured values for bearings, such as conditions of use or the sensor installation location differs, therefore require prior to analysis and comparison of measurement values of each machine are determined benchmarks.
Continuous monitoring of temperature is necessary, both or other important parts of the measure itself. Under unchanged circumstances if it is in operation, any failure of the temperature change can be said to have occurred.
High temperature often indicates that the bearing is in unusual circumstances. High temperature but is also harmful to the bearing lubricant. Sometimes overheated bearing could be attributed to lubricant. If the temperature exceeds 125 ℃ long-term continuous move to reduce life expectancy. Causes of high temperature include: inadequate or excessive lubrication lubrication, lubricant. Contains impurities, excessive load, ring of bearing damage, inadequate clearance, and oil have high friction and so on.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7211ATYNDBLP4 NSK | 55 | 100 | 21 |
| 7211A5TYNDBLP4 NSK | 55 | 100 | 21 |