In a variety of machinery and equipment, in addition to the extensive use of thin oil lubrication, in many friction pairs, using grease (referred to as the dry oil) lubrication. For example: some of the lubrication points on the top of blast furnace equipment, some of the friction pair; steelmaking shop furnace tilting mechanism of the ring gear meshing parts; a variety of metallurgical cranes; rolling mill rolling mill bearing and rack window flat friction pairs; correction straight roller bearings, shear unit group of some of the friction pair; roller bearing. Depending on the friction pair, not using separate dispersed lubrication (artificial regularly use grease gun to grease lubrication points, or grease cup); some due to friction pair number, the limitations of working conditions, there are certain difficulties with artificial fat (such as high temperature, lubrication points, artificial lipid busy, artificial fat is not easy to close to the lubrication point), you must use dry oil lubrication systems and grease on a regular basis.