性饥渴少妇做私密SPA

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Under what circumstances the use of low noise imported bearings

(1) imported bearings with low noise requirements

In the production of standard bearings in our country, some of the single row radial ball bearings and short cylindrical roller bearings have a low noise variety for motor bearings. The ball bearing from the diameter Phi 2.5mm to 60mm has several varieties with Z1, Z2 and Z3 three suffixes, which correspond to three different low-noise requirements, and roller bearings N309 type to N322 total of eight models also manufactured according to the low noise standard varieties.

These bearings can be applied to other low noise requirements of the machine, and the price is cheap, such as the type and size can meet the requirements, as far as possible the use of these two types of low noise bearings.

(2) bearings with relatively small noise

When the two types of low noise imported bearings can not be used, the relatively small noise of the bearing can be used. Specific comparison is based on the following:

1) the noise of ball bearings is lower than that of roller bearings, and the lower relative sliding of imported bearings (friction) is much lower than the relative sliding bearing;

2) using entity keep frame imported bearing noise relatively than stamping keep bracket bearing low; the use of plastic keep rack bearing noise ratio using the above two keep bracket bearing are low; multiple ball, thick outer ring, noise is small,

3) high precision imported bearings, in particular, the rolling body with higher precision bearings, its noise than the low noise bearing noise is relatively small,

4) small inlet bearing noise than large bearing noise is relatively small.


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