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。
unable to decode material, unable to decode material document and classification, straight bore shape, self-aligning alignment type, 0.7500 inches minimum and 0.7550 inches maximum distance between retaining rings