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Rolling road sound is due to INA bearings rotates roller 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 the normal condition, high quality 6203INA bearing raceway is 25 ~ 27dB. Single row deep groove ball bearing 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 INA 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 INA bearing raceway noise is unavoidable, but can take high precision machining parts work surface, the correct selection of noise INA bearing and precise to use bearing vibration.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 32040XUE1 NTN | 200 | 310 | 70 |
| 32940XUE1 NTN | 200 | 280 | 51 |