... 3.long work life 4 large size, reasonable price Four-Point Contact Ball Slewing BearingSlewing Bearing Turntabal Bearingwidely used for ... machinery, metallurgical machinery, light machinery, environmental protection machinery, engineering vehicles, solar energy, wild power, etc.Model size: VLA20304-984mm VLI20325 ... and so on Further infos, please contact us. Four-Point Contact Ball Slewing Bearing