The noise and vibration of the bearing itself are generally very low. But for small and medium-sized motors, office machinery, household appliances and instruments, which have special requirements on noise and running stability, low-noise bearings are usually selected.

2. Axial movement

The most common way to configure bearings is to install a set of axially positioned “fixed bearings” at one end of the shaft, and install a set of axially movable “moving bearings” at the other end, in order to prevent the phenomenon of stuck due to thermal expansion and contraction of the shaft. The “moving bearings” often used are cylindrical roller bearings with inner or outer rings without retaining edges. Interference fit can be used when the inner ring and shaft are matched or the outer ring and shell hole are matched.

Sometimes non-separable deep groove ball bearings or self-aligning roller bearings can also be used as moving bearings, but in the installation of the inner ring and the shaft or the outer ring and the shell hole should choose the clearance match, to ensure that the inner ring or outer ring has enough freedom of axial movement.

3. Friction torque

The friction resistance of ball bearing is smaller than that of roller bearing, and the friction resistance of radial contact bearing is smaller under pure radial load. When pure axial load is applied, the friction resistance of axial contact bearing is small. When combined load is applied, the friction resistance of angular contact bearing with similar load Angle is the least. In the need of low friction torque in the instrument and machinery, the choice of ball bearings or cylindrical roller bearings is more appropriate. In addition, contact seals should be avoided for low friction torque bearings, and it is recommended to use drop oil lubrication, oil-gas lubrication or other lubrication methods conducive to reducing wear.

4. Installation and disassembly

Bearings with cylindrical inner holes are used in machinery with frequent installation and disassembly. Separated angular contact ball bearings, tapered roller bearings, separable cylindrical roller bearings, needle roller bearings and thrust bearings should be preferentially selected. Bearings with conical inner holes can be mounted on the journal, or on the cylindrical journal with the help of a set sleeve or unloader suit for easy installation and disassembly.

If you have any quetions,pls feel free to contact us.

e-mail:bearing6@hyzcgroup.com