There are two main categories of bearing, plain and anti-friction (rolling). Plain bearings operate on the principle of sliding motion whilst rolling bearings operate on the principle of rolling motion.
Plain Bearings (Sliding Friction Bearings)
Plain bearings (sliding friction bearings) operate on the principle of sliding friction and employ no rolling elements; they are generally quieter than anti-friction bearings as they have no moving parts. Plain bearings may be used for rotational or linear applications. For example, a shaft rotating in a hole represents a plain bearing being used to constrain rotational motion; a sliding drawer represents a linear application. In engineering industries, this type of bearing is generally chosen for high load, low speed applications.
Plain metal bearings are utilized for many large machinery items, including steam turbines and large marine two stroke vessels, but they are also used for almost all internal combustion (IC) engines as they allow the bearing to be installed in two -or more- separate pieces.
Plain Metal Bearing Lubrication
3D Model Components
This 3D model shows all major components associated with a typical plain metal bearing, these include:
- Upper Bearing Shell
- Oil Grooves
- Lubricating Oil Holes
- Lower Bearing Shell