The main difference is that rolling bearings have rolling elements (balls, cylindrical rollers, tapered rollers and needle rollers), while sliding bearings have no rolling elements.

The difference between rolling bearing and sliding bearing is first manifested in the structure. The rolling bearing supports the rotating shaft through the rotation of the rolling body, so the contact part is a point. The more rolling elements, the more contact points.

The sliding bearing supports the rotating shaft through a smooth surface, so the contact part is a surface. Secondly, the motion mode is different, and the motion mode of rolling bearing is rolling; The motion mode of sliding bearing is sliding, so the friction situation is completely different Rolling bearings are generally used in relatively small mechanical equipment, such as motors, gearboxes, etc. Sliding bearings are generally used in low-speed and heavy-load working conditions, or in operating parts where it is difficult to maintain and add lubricating oil, such as the propulsion shaft of ships.