Regular maintenance, equipment operation inspection and external replacement removed SKF bearings check, an inferior race to determine the possibility of re-use or the use of good to bad. To carefully investigate and record split down the bearing and appearance, in order to clarify and investigate the remaining amount of lubricant sampling after cleaning bearings.
Second, check the raceway, the status of the rolling surface and the mating surface and the wear state of the cage without injury and exceptions.
Judgment bearing the possibility of re-use, and decided to come back later to consider the extent of the damage of SKF bearings, machine performance, the importance of operating conditions, check the cycle. Test results, SKF bearing damage and abnormalities, injury to one's content to identify the reasons for the development of countermeasures. In addition, test results, the following defects, the bearing can not be reused, you need to replace the new bearings.
    inside and outside the ring, rolling body cage which a crack and the emergence of debris.
    b inside and outside the ring, rolling body in which a spin-off.
    raceway, ribs, rolling body injury card.
    d cage badly worn or loose rivets and powerful.
    e raceway, rolling rust and injuries.
    f raceway, rolling on the indentation and hit marks.
    g on the inner ring inner diameter of the surface or the outer ring outside diameter creep.
    h overheating discoloration powerful.
    i. grease sealed SKF bearings, seals and dust cover damage to serious.
   (1) operation, inspection and fault processing
     The operation of checks bearing the rolling sound, vibration, temperature, lubrication status, as follows:
     The rolling sound of a bearing
    Measure speaker size and sound quality of the rolling sound of SKF bearings in the operation to be checked, bearing slight peeling damage, will send out abnormal tone and irregular sound, able to distinguish between measured sound device.
    Second, bearing vibration
    SKF bearing vibration damage to the bearings are very sensitive, such as peeling, creasing, rust, cracks, wear and tear and will be reflected in the SKF bearing vibration measurement, therefore, measurable through the use of special bearing vibration measurement (frequency analyzer) the size of the vibration frequency can not infer the exception of the specific situation. The measured values due to different conditions of use of the bearing or sensor installation location, determine the criteria for judging prior to the measured value of each machine.
    Third, the bearing temperature
    Bearing temperature, generally have bearings outside the room temperature can be inferred, if the use of the hole can directly measure the temperature of the bearing outer ring more appropriate bit. Typically, the SKF bearing temperature increased with the operation began slowly to reach a steady state after 1-2 hours. The normal temperature of the bearing due to the heat capacity of the machine, heat dissipation, speed and load. Lubrication, suitable mounting part, abrupt bearing temperature will rise, there will be unusually high temperatures, then have to stop running, take the necessary precautions. According to the average of a large number of test data, a variety of mechanical work is bearing outer ring temperature, for reference. As the temperature of lubrication, speed, load, environment, values in the table represents the approximate temperature range. Using the thermal sensor can always monitor the operating temperature of the bearing, and automatic alarm when the temperature exceeds the specified value of household or stop to prevent fuel-axis of the accident.
Load acting on the synthesis of radial load on the rings from the local area of the ring raceway is exposed, and transmitted to the shaft or bearing the corresponding local area, the load is called a fixed load. Which is characterized by synthetic radial load vector and the ring is relatively static. Bear the ring of directional load can choose a more loose fit.
    b rotating load acting on the rings on the synthetic radial load rotating along the circumferential direction of the raceway, sequential exposure to all parts of this load is known as the rotating load, which features a synthetic radial load vector relative to the ferrule rotation . Withstand the rotation load of the rings to be elected to a tight fit, in exceptional circumstances, such as the load is very light, or in a heavy-duty role of rings only occasional low-speed rotation, SKF bearing choose the hard material and surface roughness higher under rotating load the ring can also be used loose with.
    c swing the load acting on the rings on the synthetic radial load direction uncertain, this load is called the swinging load or non-directional load, which is characterized by synthetic radial load vector on the role of rings in the ring raceway of a certain swing within the region for a certain region of the raceway to bear, or shock loads, vibration loads, its direction, values change frequently load on the SKF bearing load. Under oscillating load bearing for the jacket ring and the week, bearing holes of the tie should be a tight fit.


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