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1, have a low noise of rolling bearing requirements: standard bearing production in our country, some single row radial ball bearings and cylindrical roller bearings with low noise for use in motor bearing varieties. Inner diameter of the ball bearing them from 2.5mm to 60mm there are a number of varieties with Zl, Z2 and Z3 are three suffixes, which correspond to three different low-noise requirements, N309 and roller bearings to the N322-a total of eight models also have varieties of low noise standards.These bearings are fully applicable to other low-noise requirements in the machine, and the price is cheap, as in type and size to meet the requirements, as these two types of low noise bearing.
2, the use of relatively low noise bearings: when you cannot use the above two types of bearings with low noise, to be used in the bearing noise is relatively small. The basis of comparison are as follows:
1) lower than roller bearings ball bearing noise, less relative sliding bearings (friction) more noise than the relative sliding bearing of low ball number, thickness of the outer ring, less noise;
2) using solid cage bearing noise is relatively lower than that of bearing cages;
3) use the plastic bearing cage noise than with the use of both types of bearing cages are low;
4) high precision bearings, in particular of the rolling element bearings with higher accuracy, the noise than the lower-precision bearing noise is relatively small;
5) bearing noise bearing noise is relatively small.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| NNU4922MBKRCC1P4 NSK | 110 | 150 | 40 |
| NN4922MBKRCC1P4 NSK | 110 | 150 | 40 |