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The raceways sound is the INA Bearing rotation rolling element raceway scroll to inspire a smooth and continuous noise, only when its sound pressure level or tone greatly when to draw attention. Fact raceway sound excited acoustic energy is limited, such as in normal circumstances, the quality 6203INA bearing raceway sound is 25 ~ 27dB. This noise to bear radial load INA single row deep groove ball bearing is the most typical, and it has the following characteristics: a. Noise, vibration randomness; b vibration frequencies above 1kHz; regardless of the speed of changes in, the main noise almost the same frequency and sound pressure level with the speed increase and improve; d when the radial clearance increases, the sound pressure level increased dramatically; e.INA bearing rigidity increases, the overall sound pressure level is lower, even if the speed increased, its overall sound pressure also increases little; higher the f lubricant viscosity, lower the sound pressure level, but for grease lubrication, the viscosity, the shape of the soap fibers can affect the size of the noise value.
Raceway sound generating source is due to inherent vibration by the load ferrule. Rings and rolling bodies elastic contact a nonlinear vibration system. Will stimulate the natural vibration of the elastic characteristics when lubrication or not high machining accuracy, passed to the air becomes noise. As we all know, even the the contemporary most manufacturing technology and processing INA bearing parts, work surface there will always be varying degrees of tiny geometric error, so that the roll tiny fluctuations Road and rolling body to stimulate the natural vibration of the vibration system.
Work surface, high precision machined parts can be taken to the correct selection of the INA bearings and precise use of INA bearings make NVH.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7903CTYNSULP4 NSK | 17 | 30 | 7 |
| 7902A5TYNSULP4 NSK | 15 | 28 | 7 |