Which type of bearing installation is typically subjected to swinging motion?

Wrist pin bearings are designed to accommodate motion that involves swinging or oscillating movements, particularly in reciprocating engines. These bearings connect the piston to the connecting rod, allowing for both rotational and linear motion as the piston moves up and down within the cylinder.

The swinging motion is critical in this application, as the wrist pin bearing must support the forces generated during the operation of the engine while allowing for the necessary angular movement. Other types of bearings listed do not typically engage in this sort of dual motion. Main shaft bearings primarily deal with rotational motion along a fixed axis, thrust bearings are designed to handle axial loads in a linear manner, and radial bearings primarily support loads directed along the radius of the shaft. Therefore, the nature of wrist pin bearings' design makes them uniquely suited for applications involving swinging motion.