Sliding bearings are bearings where only sliding friction is generated. The shaft is generally supported by the sliding surface, with oil and air in between to facilitate sliding movement. Sliding bearings are lightweight and have a long operating life while introducing minimal vibrations or noise.
The slide bearing assembly consists of structural pads, a PTFE sliding surface (or other low-friction material) and slide bearing plates. Subtypes of slide bearings include linear ball bearings and linear roller bearings. Slide bearings may also be referred to as linear bearings, guide bearings, or linear slide bearings.
They may be used in applications such as construction (expansion supports for bridges) and precision tooling.