SLEWING BEARING

To provide a slewing bearing in which an outer ring split ring composed of a pair of plate members is fixed to form an outer ring, and an inner ring split ring composed of a pair of plate members is fixed to form an inner ring, thereby attaining weight saving in a thin manner and reducing its manufacturing cost.SOLUTION: An outer ring 1 is formed by fixing an outer ring split ring 3 composed of a pair of plate members, the outer ring split ring divided into two at an axial intermediate position of a raceway groove 5, and an inner ring 2 is formed by fixing an inner ring split ring 4 composed of a pair of plate members, the inner ring split ring divided into two at an axial intermediate position of a raceway groove 6. The outer ring split ring 3 and the inner ring split ring 4 are each formed by, for example, pressing a preset plate member having a predetermined thickness.SELECTED DRAWING: Figure 2 【課題】この旋回軸受は，一対の板部材から成る外輪分割輪を固定して外輪を形成し，一対の板部材から成る内輪分割輪を固定して内輪を形成し，薄形で軽量化を達成し，製作コストを低減する。【解決手段】外輪１は，軌道溝５の軸方向中間位置で二分割した一対の板部材から成る外輪分割輪３を互いに固定して形成し，また，内輪２は，軌道溝６の軸方向中間位置で二分割した一対の板部材から成る内輪分割輪４を互いに一固定して形成する。外輪分割輪３と内輪分割輪４は，予め決められた所定の板厚の板部材を，例えば，プレス加工してそれぞれ形成されている。【選択図】図２