Before the installation of the slewing bearing, the installation surface of the main engine shall be inspected first, and the supporting parts shall have sufficient strength, the connection surface shall be machined, and the surface shall be flat and free of sundries and burrs. For those that cannot be machined to meet the required flatness, special plastics with high injection strength can be used as fillers to ensure the accuracy of the installation plane and to reduce vibration. The ring of the rotary table bearing has a quenched soft belt area, which is marked with s on the end face of the ring. During installation, the soft belt should be placed in the non load area or non frequent load area (the plug hole is always located in the soft belt area).

When installing the slewing bearing, the radial positioning shall be carried out first, the mounting bolts shall be tightened crosswise, and the slewing condition of the bearing shall be checked. In order to ensure the smooth transmission of the bearing, check the engagement of the gear before tightening the mounting bolts. Sufficient pre tightening force shall be provided when tightening the bolt, and the pre tightening force shall be 70% of the yield limit of bolt material. The bolts shall be equipped with tempered flat washers, and spring washers are strictly prohibited. After the installation of the rotary table bearing, put it into operation. After 100 hours of continuous operation, check whether the pre tightening torque of the mounting bolt meets the requirements. In the future, repeat the above inspection every 500 hours of continuous operation.

After the slewing bearing is installed, it shall be filled with proper amount of grease, and the slewing bearing shall be filled at the same time to make the grease evenly distributed. After working for a period of time, the rotary table bearing will inevitably lose a part of lubricating grease. Therefore, the lubricating grease shall be supplemented for the rotary table bearing in normal operation every 50-100 hours. For the rotary table bearing working in high temperature or dusty condition, the period of adding lubricating grease should be shorter. When the machine is to be stopped for storage, it must also be filled with enough grease.

Lubrication and maintenance method of slewing ring:

1. When the slewing ring is delivered from the factory, a small amount of No.2 extreme pressure lithium base grease (GB / t7324-1994) is coated in the track. When it is put into use, it shall be refilled with new grease according to different working conditions.

2. The raceway of slewing ring shall be regularly filled with grease. Oil shall be added once every 100 hours for general ball bearings and once every 50 hours for roller bearings. The lubrication period shall be shortened in special working environment, such as tropical zone, high humidity, large dust, large temperature difference and continuous operation. Before and after the machine stops running for a long time, it must also be filled with new grease. Each time lubricating, the raceway must be filled with lubricating grease until it seeps out from the sealing belt. When injecting lubricating grease, slowly rotate the slewing ring to make the lubricating grease filled evenly.

3. The gear surface shall be cleaned of sundries frequently and coated with corresponding grease.