Rod end bearing (commonly known as rose joint in the U.K or Heim joint in the US) is a mechanical articulating joint. It consists of a spherically-shaped inner ring
and a bore on the shaft (cylindrical) for mounting. Rod end bearings are used when articulating joint is needed and where clevis end is unsuitable. They are very common on the ends of control rods. They are mainly used on the end of shafts
, cylinders, rods, and linkages to take angular misalignment when connected parts are in motion. This is why they are very common in the military, aerospace, and automotive applications. In the auto industry, the bearings are very common in transmission linkages and steering knuckles. When designing rod end bearings, the main focus is maximum angular misalignment and load capacity. In most of the cases, the motion of the rod end bearing is symmetrical while the optimal angular misalignment is half the entire side-to-side range. The rod end bearings are attached to shafts and rods through studs designed with female housing. Female housing will in most of the cases feature internal threads. If they are right-handed threads, the movement is clockwise while the left-handed threads move in a counterclockwise direction.