Indicators that can reflect the running state of the bearing

1. Temperature

If the bearing has quality problems, assembly problems, or poor lubrication, it will cause the bearing to heat up and the temperature will exceed the standard. General regulations stipulate that the operating temperature of rolling bearings cannot exceed 95°C, and the operating temperature of sliding bearings is generally not allowed to exceed 80°C. If the bearing operating temperature is normal, it can be determined that the bearing has no major problems in all aspects, and the sound of the bearing will be normal. If there is only a "hissing" sound from the bearing, replenish the grease in time.

2. Sound

If the bearing has quality problems, assembly problems or poor lubrication, the bearing is short of oil; if it makes a "gurgling" or "crunching" sound, the bearing is damaged.

3. Vibration

If the excessive vibration of the motor is caused by the bearing, according to the magnitude of the vibration, it can be judged that the bearing is damaged, the bearing running sleeve or the bearing clearance is too large.

4. Temperature rise

The most accurate criterion for judging the good running state of the bearing should be the normal temperature rise, and this "temperature rise" does not refer to the difference between the bearing and the ambient temperature in the usual sense, but the difference between the bearing temperature and the temperature of the motor body. value. The reason for this is that if the motor is overloaded and the current is too large to generate heat, it will cause the body temperature to exceed the standard. At this time, even the bearing temperature in good operating condition will exceed the standard, but this "temperature rise" is normal.

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