These are the bearings that hold up rotating machinery like ball mills and rotary kilns. A trunnion, a cylindrical protrusion used to install the bearing, supports the bearings, which are normally mounted at either end of the apparatus. The actual bearing, which is typically a journal or sleeve bearing, enables the machinery to revolve smoothly and with little resistance. To lessen wear and increase lifespan, trunnon bearings can be greased with oil or grease. They can be of different varieties, such as hydrostatic, hydrodynamic, and self-aligning bearings, and they are frequently used in heavy machinery and industrial equipment like mills, kilns, and other rotational equipment.
