Abstract: The linear-motion rolling guide unit with a flange cover can easily provide the slider with a flange portion for mounting the slider to a mount and can reduce the production cost. The linear-motion rolling guide unit with a flange cover includes an outer cylinder forming the slider, which is sleeved over the elongate track rail having longitudinally extending raceway grooves formed in the outer surface thereof so that the outer cylinder can slide on the track rail and receive rotary torque from it. To securely fix the outer cylinder to the mount, the linear-motion rolling guide unit has a flange cover that comprises a cover body covering the outer cylinder, a flange portion formed at one end of the cover body and having mounting holes, and a locking portion formed at the other end of the cover body and extending inwardly to engage the end face of the outer cylinder. The flange cover can be formed easily by deep drawing of a sheet steel.

Abstract: The present invention provides a ball spline which enables the manufacturing of an outer cylinder to be done simply, the manufacturing cost to be reduced, and the loading of balls to be done easily. This ball spline comprises a slider fitted around a ball spline shaft so that the slider can be slid freely thereon, and so that rotational torque can be transmitted to the slider. In the slider, a retainer unit fitted in the outer cylinder is divided into two at the regions of direction changing passages, and rings provided with curved portions constituting guides for balls are fitted in the portions of the outer cylinder which are opposed to the regions of the direction changing passages. The rings are fitted between the outer cylinder and retainers.