1, with low noise requirements of the rolling bearing are: in China, the production of standard bearings, single row radial ball bearings and cylindrical roller bearings with low noise varieties for machine bearings. The ball bearing from the inner diameter of 2.5mm to φ 60mm have several varieties with Zl, Z2 and Z3 three kinds of suffixes, corresponding to the three kinds of low noise of different requirements, and roller bearings from type N309 to type N322 eight models are made according to the standard varieties of low noise. These bearings can apply to the other requirements of the low-noise machines, and the price is cheap, such as on the type and size to meet the requirements, as far as possible the use of low noise SKF bearings of these two types of.
2, the bearing noise is relatively small: when low noise bearings can not be using the above two types of bearing noise, can use relatively small. Comparison on the basis of the specific as follows:
1) the noise of the ball bearings than roller bearing low, relative bearing sliding less noise than the (friction) FAG bearings slide relatively more low; cones, the outer ring thickness, noise is small;
2) noise using solid cage bearing relatively than using stamping cage bearing low;
3) noise using plastic retainer bearing than using the above two kinds of cages of bearings are low;
4) bearing precision is high, especially bearing rolling body is of high precision with low noise, the noise than the relatively small precision bearings;
5) low noise bearings than large NSK bearings noise is relatively small.