Lubricating grease is used in any type of machinery with rolling or sliding contacts. This can include bearings, gears, couplings, slides, linkages, chains, pin and bushing points, fifth wheels, hinges, constant velocity joints, adjustment mechanisms, etc. Greases are used in components used in electric motors, machine tools, railroad and construction equipment, instruments, household appliances, etc. Greases are also commonly used in slow-speed sliding applications and small gearboxes. A large majority (as much as 90%) of all bearings are grease lubricated.