The turntable bearing needs to maintain sufficient preload, so under working conditions, the bolt preload needs to be checked once every operating hour, and then checked once every operating hour. The bolts should be replaced every year or after working hours. 02 When the bearing is used in dusty and humid areas, it is necessary to do regular inspection and lubrication according to the specific use conditions. The bearing should be replaced with new grease before and after a long period of stoppage. When lubricating the bearing, the raceway must be filled with grease every time, and then the bearing must be slowly rotated to allow the bearing to be fully and evenly filled.