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(1) the raceways of rolling bearing and its control method of Raceway when sound is when the rolling element bearing running, its rolling rolling rolling on the pavement and making a slippery continuous sound, is typical of all rolling bearings are basic. General bearing Raceway acoustic of sound that is combined with other sounds. Ball bearing Raceway is irregular, above 1000Hz frequency, frequency rate does not change with the speed of it, but the total sound pressure level increases with the speed faster. Roller bearings, rolling road sound sound pressure levels decrease with increasing viscosity; small bearings and raceways, the sound pressure level in the viscosity increases to about 20mm2/s above, by a reduction to increased. Greater the rigid housings, rolling road, lower the overall sound pressure level of sound. Radial clearance is too small, and Raceway total sound pressure level and frequency increases with reduced radial clearance and increased dramatically. Control method of the Raceway: Optional low noise bearings with bearing corrugated-small, carefully selected conditions of use. Raceway often affects the entire mechanical noise, reduce Raceway entire machinery noise could be reduced.
(2) impact sound and its control method of rolling ball bearings or cylindrical roller bearings of larger models when running at low speed under purely radial load, due to the centrifugal force of the rolling small rolling elements will impact the non-loading area roll cage or road noise. But as the speed increases, this noise will disappear. Rolling control method for impact sound: appropriate reduction of radial clearance, reasonable structure and material compliance of bearings with a cage.
(3) the creak of rolling bearing and its controlling method creak is a cylindrical roller bearings on all occasions the possibility of harsh metallic sound, mostly in the larger models of grease lubrication bearings and deterioration in the base oil in lubricating grease easier to, almost did not occur when the oil lubrication. In addition, easier in winter, when you are subjected to purely radial load, radial clearance is prone to big occasions, and with the size of different models, are apt to occur within a range of specific speeds, both continuous and intermittent. External ring road for special processing methods can prevent a creak from appearing, this bearing if necessary, or appropriate reduction of radial clearance of bearings, using excellent grease and improve matched bearings mechanical rigidity.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7230ATYNSULP4 NSK | 150 | 270 | 45 |
| 7230A5TYNSULP4 NSK | 150 | 270 | 45 |