The difference between rolling bearing and sliding bearing
The main difference is that the rolling bearing has rolling elements (balls, cylindrical rollers, tapered rollers, needle rollers), and the sliding bearing has no rolling elements.
The difference between the rolling bearing and the sliding bearing is firstly expressed in the structure. The rolling bearing supports the rotating shaft by the rotation of the rolling body, so the contact portion is a point, and the more the rolling elements, the more the contact points are;
The sliding bearing supports the rotating shaft by a smooth surface, so that the contact portion is a face. Secondly, the movement mode is different, and the movement mode of the rolling bearing is rolling;
The side bearing moves in a sliding manner and the friction is completely different. Rolling bearings are generally used in relatively small mechanical equipment, where the speed is high,
For example, motors, gearboxes, etc., sliding bearing applications are generally under low-speed heavy-duty conditions, or difficult to maintain and fill the operating parts of the lubricant,
Such as the propulsion shaft of the ship.