(1) Rolling bearings with low noise requirements

Of the standard bearings produced in China, some single-row radial ball bearings and short cylindrical roller bearings have low-noise varieties used in power bearing bearings. Among them, there are several varieties of ball bearings from the inner diameter φ2.5mm to φ60mm with three suffixes Zl, Z2 and Z3, which correspond to three different low-noise requirements. Eight types of roller bearings from N309 to N322 are also available. Variety manufactured according to low noise standards.

These bearings can be applied to other machines with low noise requirements, and the price is cheap. If they can meet the requirements in type and size, try to use these two types of low noise bearings.

(2) Use relatively quiet bearings

When the above two types of low-noise bearings cannot be used, bearings with relatively low noise can be used. The specific comparison basis is as follows:

1) The noise of ball bearings is lower than that of roller bearings, and the (friction) noise of bearings with less sliding is lower than those with relatively sliding;

2) The noise of the solid cage bearing is relatively lower than the bearing of the stamped cage; the noise of the plastic cage bearing is lower than the bearing of the above two cages; the number of balls is thick, the outer ring is thick, and the noise is relatively low Also smaller,

3) High-precision bearings, especially those with higher accuracy of rolling elements, have relatively lower noise than low-precision bearings.

4) The noise of small bearings is relatively smaller than that of large bearings.