Linear bearings are divided into metal linear bearings and plastic linear bearings.
Metal linear bearing is a linear motion system produced at low cost, used in conjunction with a cylindrical shaft with an infinite stroke. Since the bearing ball is in point contact with the shaft, the use load is small. The steel ball rotates with very little frictional resistance, so that high-precision and smooth motion can be obtained.
Plastic linear bearing is a kind of linear motion system with self-lubricating characteristics. The biggest difference between metal linear bearing and metal linear bearing is that the metal linear bearing has rolling friction, and the bearing and the cylindrical shaft are in point contact, so this is suitable for low-load and high-speed movement; Plastic linear bearings are sliding friction, and there is surface contact between the bearing and the cylindrical shaft, so this type is suitable for high-load, low-speed movement.
