Slewing bearings mounting have a widely range of types. Several substrate installation types are as below. In order to obstacle some special environments, Many structures should be changed including the pattern of the hole, the raceway and grease etc. the integration of the incomplete ring gear and the special seal. The slewing bearing structure shown below is for explaining only. Some important details in the actual design, such as the thickness of the mounting plate, the position and number of reinforcing members, and the length of the bolt, are all determined by the engineer and will not be elaborated here.