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。
black acetal plastic (delrin)outer sleeve and ball retainer,8620 heat treated steel bearing plates,chrome steel grade 25 bearing balls,4 circuit rows,2 snap ring grooves,0.3750 in.nominal inside dia,0.6250 in.nom fixed outside dia,0.8750 in.lg,1/2 deg self-aligning in all directions; special features