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。
0.4370 inches nominal distance between retaining rings, unable to decode material, 0.4996 inches minimum and 0.5000 inches maximum overall outside diameter, 0.7350 inches minimum and 0.7500 inches maximum overall length, 0.2495 inches minimum and 0.2500 inches maximum working bore diameter