Abstract: A universal head changes the orientation of a tool freely and machines a workpiece with the tool in the changed orientation. The universal head comprises a universal head body, for swiveling movement, including a swinging unit and an attachment detachably mounted on the swinging unit with a rotating tool removably mounted on the attachment. The universal head has, and simultaneously offers, the advantages of both a universal head, which allows the tool to change its orientation freely for machining a workpiece, and an attachment which allows the tool to be brought closely to the workpiece for machining the workpiece. The universal head does not require a process of installing itself on and removing itself from a universal head support.

Abstract: In the multi-axial machine tool, a table unit is detachably mounted on the upper surface of the interior portion of a portal bed disposed on a leg. The table unit comprises a table base fixed to the upper surface of the leg, a turning table which, when it is viewed at a reference working position, is turnably disposed on an inclined turning surface of the table base formed so as to be inclined in a descending manner toward a front side of the machine tool, and a work table disposed on the table support portion of the turning table so as to be turnable around axes lying in parallel with the axis of a spindle.

Abstract: In the multi-axial machine tool, a table unit is detachably mounted on the upper surface of the interior portion of a portal bed disposed on a leg. The table unit comprises a table base fixed to the upper surface of the leg, a turning table which, when it is viewed at a reference working position, is turnably disposed on an inclined turning surface of the table base formed so as to be inclined in a descending manner toward a front side of the machine tool, and a work table disposed on the table support portion of the turning table so as to be turnable around axes lying in parallel with the axis of a spindle.

Abstract: In a vertical machining center, side covers (22) are provided upright on a saddle on opposite sides of a column. The side covers (22) each have a surface having a fitting groove (22c) defined between an open/close door (22b) and an inspection window (22a) of a rhomboidal shape having anteroposteriorly inclined longitudinal edges. A front cover (25) is attached to the column. Elongate seal members (27) are respectively provided along opposite side edges of the front cover (25) as vertically extending in sliding contact with the surfaces of the side covers (22) for closing small gaps defined between the side edges of the front cover (25) and the surfaces of the side covers (22).