The inner side surface of the ballsleeve is contained outside the joint head in an insulating way to form a cardan joint.
球套内侧面吻合包含于关 节球面之外，形成万向节。
2
For mounting bearings on an adapter sleeve, see the relevant pages in the sections "Self-aligning ball bearings", "Spherical roller bearings", and "CARB toroidal roller bearings".