Raceway sound is due to the tapered roller bearing rolling elements rolling in raceway rotation and stimulate a smooth and continuous noise, the level or tone when aroused great attention only when. In fact, inspired by the raceway sound acoustic energy is limited, as in normal circumstances, the quality of FAG bearing raceway sound of 25 ~ 27dB. This noise with radial load bearing is the most typical, it has the following characteristics:

a. noise and vibration is random;

b. vibration frequencies above 1kHz;

c. irrespective of speed changes, the main frequency noise is almost constant and the sound pressure level increases with the speed increase;

d. When the radial clearance increases, the sound pressure level increased dramatically;

e. bearing rigidity increases, the lower the overall sound pressure level, even if the speed increases, the total sound pressure level increases is not;

f. The higher viscosity of the lubricant, the lower the sound pressure level, but for grease lubrication, its viscosity, soap fiber shape and size can affect the noise level.

Raceway sound generated by the source that the ring after the natural vibration loads due. Since the elastic contact rings and rolling elements constituting the nonlinear vibration system. When lubrication or machining accuracy is not high and this will stimulate the natural vibration of the elastic characteristics related to the air then passes into noise. As we all know, even with the highest levels of contemporary manufacturing techniques tapered roller bearing parts, small geometric errors in its work surface level presence will always be different, so that produce between raceway and rolling element minor fluctuations in the natural vibration excitation vibration system.

Although FAG bearing raceway noise is inevitable, however, can take high-precision machining parts work surface, use the correct selection of bearings and precision bearings make noise damping.

The so-called burn injury in bearing state means: wheel bearing raceways, rolling elements and cage in the rotation until rapid heating discoloration, softening, deposition and damage.

The main reason for tapered roller bearings burns due to poor bearing lubrication, we may use informal lubricant or lubricant too much, too little, is not correct.

Next may be too large load (preload too large). Speed is too large. Clearance is too small. Water or other foreign body. If the above two cases is that the shaft is not so bad precision of the bearing housing, shaft deflection is large. See here, I think we all want to know the solution of it, first of all, to study the lubricant and lubrication method, the election of the bearing lubricant, and its amount, but also to correct the FAG bearing selection. Research to tie, bearing clearance and preload, and improved seals. Check the shaft and precision bearing housing. Of course, if you are next to some experts, then let him operate, you can learn the best! Recommends tapered roller bearings, we should pay attention to the installation, lubrication, clearance and other aspects have been done as accurate as possible, in place.