In general, after the start of operation, the needle roller bearings will warm, after a period of time, i.e. to a lower temperature (usually higher than room temperature 10 to 40 degrees) in the normal state. Timken imported bearings around the exothermic conditions to the normal time, according to the bearing size, form, and the rotational speed, the lubrication method, the change in different, generally requires from 20 minutes to several hours.

The needle bearing temperature does not meet the normal and abnormal temperature, could be considered for the following reasons, the addition should stop and take the necessary countermeasures. Temperature to maintain of TIMKEN bearings appropriate life and prevent the deterioration of lubricants is essential, it is recommended that: try to control (generally less than 100 degrees) is ideal to use in non-high-temperature state. The main abnormal temperature rise lubricants too much or too little. Bearing install adverse. TIMKEN bearings internal clearance is too small or too large load. The friction of the sealing means is too large. The lubricant inconsistent. The mating face of creep.

Rolling noise one is generated by the bearing itself bearing, i.e., the inherent noise; another is the bearing installed after the noise generated, regardless of the noise of the bearing itself by listening to the sound can be analyzed some problems a) the inherent noise: roller Road Sound bearings and rolling friction sound (cylindrical roller bearings) the rolling bearing inherent in the sound. "raceway sound is generated by the elastic properties of the rolling element and raceway contact, when the rotation of the needle bearing, rolling element issued in raceway scroll a continuous and smooth sound; abnormal sound of rolling friction may issue a "creak, creak like uncomfortable metal friction unusual sound, good lubrication will not issue such a sound so no problem in the general case, the only noise increases need to pay attention b) Bearing Manufacturing noise: here, including noise and vibrato cage, cage noise occurs mainly in ball bearings and tapered roller bearings, when the needle bearing rotation due to vibration of the cage and keep the frame and rolling body collision will sound the sound has a periodic vibrato (bearing) is the sound of a certain frequency, raceway waviness caused by vibration generated c) noise caused by improper use: there are all kinds of bearings. bearing raceway surface or rolling surface by the bumps, indentations, corrosion, and it will produce a certain period of noise and vibration when the needle bearing dust invasive operation will produce dirt noise This noise is aperiodic also accompanied by vibration not fixed the size of the sound, sometimes no.

Vibration of the needle bearing obvious effect of the bearing failure. Peeling, for example: the indentation, corrosion, cracks, wear and tear and will be reflected in the bearing vibration detected out through the use of special bearing vibration measuring device (frequency analyzer and vibration analyzer ) Measurable inferred by the frequency distribution of abnormal vibration of the specific circumstances of the measured values ​​of the size of the vibration due to the use conditions of the needle bearings or the sensor mounting position, etc. with different required in advance of each machine measured values ​​were analyzed and compared After determining the criteria.