- Hello Customer - Log in or Register!
Raceway is spherical roller bearing rolling body due to rotation of rolling in the raceway and create a smooth and continuous noise, only when the sound pressure level or tone greatly when attention. In fact, the acoustic excitation say is limited, such as in normal circumstances, self-aligning ball bearing raceway acoustic quality is 25 ~ 27dB. FAG bearings this noise to bear radial load as the most typical, it has the following characteristics:
A. noise, vibration is random;
B. frequencies in more than 1kHz;
C. No matter how changes in speed, noise frequency and sound pressure level is almost unchanged with the increase of speed and improve the;
D. when the radial clearance increases, the sound pressure level increases sharply;
Rigid E. bearing increases, the lower the total sound pressure level, even if the speed increased, the overall sound pressure level is slightly increased;
F. lubricant viscosity is high, the sound pressure level is low, but for grease lubrication, the viscosity, the soap fiber shape and size can affect the value of noise.
Rolling road sound source is the inherent vibration caused by load ring after. Because the elastic contact rings and rolling elements composed of nonlinear vibration system. When the lubrication or machining precision is low, will stimulate the inherent vibration and the elastic characteristics, transfer to the air becomes noise. As everyone knows, even if is the use of modern technology in manufacturing the highest machining spherical roller bearing parts, its work surface there is not a small degree of geometric error, so that the raceway and rolling body to produce small wave excitation vibration vibration system.
Although the raceway of self-aligning ball bearing noise is unavoidable, but can take high precision machining parts work surface, the correct selection of noise FAG bearing and precise to use bearing vibration.
The so-called bearing burn injury refers to: rolling wheel, a rolling body of the bearing and cage spinning rapidly heating until the discoloration, softening, melting and breakage.
Main reasons causing the self-aligning roller bearing burn is due to poor lubrication of bearings, may use the informal lubricant or lubricant, too much, too, is not correct.
The second may be excessive load ( preload is too large ). Speed is too high. Clearance is too small. Water or other foreign bodies penetrated. If the deflection above two conditions are not so is shaft, bearing housing poor accuracy, the large shaft. See here, I think we all want to know the solution, first of all, to study the lubricant and lubrication method, choose the FAG bearing lubricant, and its content, and to correct the self-aligning ball bearing selection. Research should cooperate, bearing clearance and preload, and improved sealing device. Check the shaft and bearing box accuracy. Of course, if the experts say next to you, let you learn the best operation!
Recommendations in the spherical roller bearings use, should pay attention to installation, lubrication, the gap are accurate as far as possible, in place.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7009ADF NSK | 45 | 75 | 16 |
| 7909CDF NSK | 45 | 68 | 12 |