一種圓柱形裝置,包含三個或更多個長方形球迴路,並配有一個保持器以引導球沿正確的路徑移動,專門設計用於滑動直線運動軸,以最大限度地減少摩擦和磨損。
1.0470 inches minimum and 1.0770 inches maximum distance between retaining rings, straight bore shape, rigid alignment type, 1.2496 inches minimum and 1.2500 inches maximum overall outside diameter, 1.6250 inches nominal overall length