As the shaft begins to turn in the direction shown, it will roll up the inner surface of the bearing until it slips. Here it will remain in a more or less fixed position during rotation. The torque M required to maintain rotation and the radial load on the shaft will cause a reacion R at the contact point. For vertical equilibrium R must equal W but will not be
Application of Friction
Journal Bearing
A journal bearing is one which gives lateral support to a shaft in contarst to axial or thrust support. Shown below is the dry or partially lubricated bearing. The forces acting on the shaft are shown.
