there is an upper spacer ring 12 directly beneath the plate 5 and a lower spacer ring 13 directly above the threaded nut 9 the interiors of both of the spacer rings 12 and 13 are frustoconically shaped and both open wider toward one another disposed longitudinally between the frustoconical spacer rings 12 and 13 is the longitudinally elongate longitudinally slit clamping ring 14 which has a frustoconically shaped top and bottom end which cooperates with the frustoconical openings in the spacer rings 12 and 13 upon tightening of the threaded nut 9 over the lower end of the exterior of the sleeve 2 the sleeve 2 is pulled downwardly and force is applied upwardly against the lower spacer ring 13 this securely clamps the sleeve 2 to the spindle bearing plate 5 in all embodiments removal of the sleeve 2 along with the spindle housing 1 that it supports from the spindle bearing plate 5 merely requires loosening of the nut 9 which frees the respective wedge clamping of the respective embodiment then the spindle sleeve 2 may be removed from the opening in the spindle bearing plate and the spindle is then removed from the slit sleeve the wedge connections of each of the embodiments secures the sleeve.