INSTALLATION & MAINTENANCE OF SLEWING BEARING

Before installing the slewing bearing, checking the mounting surface of the main machine, and the supporting spare parts should have sufficient strength. The connecting surface should be machined, the connection surface should be smooth without burrs. While the surface is hard to be smooth, a special plastic with large injection strength can be used as stuff to ensure the accuracy of the installation plane and to reduce vibration.

The slewing bearing has a quenching soft zone, which be marked “S” on the unloading surface, we should avoid heavy loading or unusual loading area from the soft zone. When installing the slewing bearing, test radial positioning, tight the mounting bolts crossing, and check the bearing rotating. When tightening the bolts, there should be sufficient for pre-tightening force, and the pre-tightening force should be 70% of the yield limit of the bolt material. Mounting bolts should match with Q&T washers while spring washers are strictly prohibited.

After the slewing bearing put into operation over 100 hours of continuous operation, it should be fully checked whether the pre-tightening torque of the mounting bolt meets the requirements, and following every 500 hours after continuous operation required the same processing. The slewing bearing should be filled with a proper amount of grease after installation, and equally spaced the grease. After the slewing bearing has been working for a period of time, it will inevitably lose a part of the grease. Therefore, the slewing bearing should add grease once every 50 to 100 hours while the slewing bearing under normal processing.

Storage:

The imported slewing bearing should be placed horizontally in a place of dry, ventilated and flat surface, and should be stored away from chemicals and other corrosive items. If multiple sets of bearings are required to be stacked aside, more than three equal wooden blocks should be evenly placed, and the positions of the upper and lower blocks should be consistent. If the slewing bearing disposed for a long time, re-cleaned and rust-proofed is needed.