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Bearing noise is caused is more complex, one of which is within, the outer mating surfaces of the bearing wear. Because of this wear, damaged bearing and shell, the cooperation relationship between the bearing and shaft, led to deviations from the correct location, noise resulting from the axis at high speed. When bearings are tired, its surface metal flaking, there will be bearing radial clearance increases the noise. In addition, insufficient bearing lubrication, the formation of dry friction and bearing broken produces abnormal noises. After bearing wear loose, loose cage damage, will also have an abnormal sound.
Raceway on bearing raceways and how it is measured when sound is when the bearing operation, its move is being issued on Raceway surface to move a slippery continuity of sound, bearing what types of seals? Is the foundation of cities without moving bearing no sound. General bearing Raceway sound with other sounds. Ball bearing roller is not law, frequency is above 1000Hz, the frequency does not change with the speed of it, but its sound pressure levels depending on the speed, acceleration and added. Roller bearings, its acoustic sound pressure level with rolling road add viscosity and cut Raceway smaller bearings, whose sound pressure level is when the viscosity by adding up to about 20mm2/s, from reduced to nothing by deleting it. More rigid housings, acoustic sound pressure level of the lower of the Raceway. Radial visiting the gap is too small, acoustic sound pressure level of the Raceway and will fight radial stroll from frequency-gap cuts and sharp added. No sound control Raceway by way: choose low noise bearings bearing corrugated-small, carefully selected prerequisites. Sound effects often zero mechanical noise of the Raceway, cutting Raceway to cut zero mechanical noise.
Move the impulse noise and how it is controlled a large model of ball bearings or bearings being under purely radial load at low speed operation, due to the centrifugal force of the moving body smaller, is in the area of non-load move could impact link or raceways and noise. But with anti-speed forward, that kind of sound will be inclined. Moderation of the impact on the moving body without proper cutting radial visiting the gap, without a reasonable layout and material without mild link bearings.
Bearing the creak and creak bearing in moderation are no places are likely to occur in harsh metal sound unpleasant, mostly are larger models of grease lubrication bearings which are outside the functional deterioration of the base oil grease more difficult, is oil lubricated with little happening. In addition, winter is more difficult, when under purely radial load, light radial place for visiting the gap is difficult, but with the size of model differences, is speed of light within the context of a particular difficulty, both continuing and intermittent flush. Adoption of specific forms of processing of external ring road to creak-proof flush, bearing the kind can be used when needed or appropriate reduction of bearing radial visit gap, using inferior function show goes ahead before the grease and bearings, mechanical rigidity.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 7211CTYNDBLP4 NSK | 55 | 100 | 21 |
| 7210ATYNDBLP4 NSK | 50 | 90 | 20 |