What types of bearings are typically used in reciprocating engines?

Reciprocating engines primarily use bearings that support both the radial and axial loads generated during operation. Plain bearings, also known as bushings, provide a smooth surface for the moving parts and are particularly effective in low-speed applications where they can support heavy loads. They are often found in areas where a continuous surface is advantageous, such as the main and connecting rod bearings.

Ball bearings are commonly used in applications where reduced friction is necessary, and they can accommodate both radial and axial loads. They are effective at high speeds and can handle significant loads in a compact form, making them suitable for various engine components.

Roller bearings, which include various types such as cylindrical and tapered roller bearings, can support heavier loads than ball bearings due to a larger contact area. They are particularly useful in scenarios where there might be a combination of radial and axial forces.

In summary, the combination of plain, ball, and roller bearings reflects the typical requirements in reciprocating engines for load capability, durability, and efficiency under varying conditions.