When we use NSK bearings, if you find its temperature is very high, then hurry to stop the equipment running, and then find out its cause, and in accordance with the solutions provided above to deal with, but may be due to the bearing heat for different reasons, so the solution is also different, so it is still necessary to deal with the specific circumstances, with the help of technical personnel to complete.

1, to check the temperature of imported bearings when rotating if the use of oil holes can directly measure the temperature of the outer ring of the bearing, it is more bit appropriate. In general, the temperature of the bearing, generally based on the temperature outside the bearing room can be inferred. If the lubrication, installation department is appropriate, the bearing temperature will rise sharply, there will be abnormally high temperature, then must stop running, take the necessary precautions.
2, check the sound when the bearing rolling situation because the bearing even if there is a slight peeling and other damage, will also send out the abnormal sound and irregular sound, so the use of microphone can be distinguished, the use of microphone, the size of the rolling sound of the bearings in the operation of the sound and the sound quality to check, and play a preventive role in advance.

3, check the vibration of imported bearings in the work from spalling, indentation, corrosion, cracks, wear and tear will be reflected in the vibration measurement of bearings, bearing vibration damage to bearings is very sensitive, therefore, through the use of special bearing vibration measurement (frequency analyser, etc.) can be measured by the size of the vibration, through the frequency of the points can not be deduced by the specific circumstances of the anomaly. Since the measured values vary depending on the conditions of use of the bearing or the location of the sensor installation, it is necessary to analyse and compare the measured values of each machine beforehand to determine the criteria for judgement.

Generally, the temperature of the bearing starts to rise slowly with the start of operation, and the introduction of the bearing plating removal process and should reach a stable state after 1-2 hours. The normal temperature of the bearing varies with the heat capacity of the machine, heat dissipation, speed and load.
Whether on the shaft or in the housing, imported bearings are required to fix their position in three directions such as radial, axial and tangential directions. Radial and tangential positioning is through the bearing collar tight fit to achieve, however, the axial positioning only in a few cases using tight fit; general use of axial limit parts, such as end caps and retaining ring will be limited to axial position in the clearance range.