Slewing bearings comprise an inner ring and an outer ring, one of which usually incorporates a gear. Together with attachment holes in both rings, they enable an optimized power tramission with a simple and quick connection between adjacent machine components. The bearing raceways, in conjunction with the rolling elements and cages or space, are designed to accommodate loads acting singly or in combination, and in any is ipired by the Japanese company 日本モノレース工業(yè)株式會(huì)社