A machine tool comprises a tool spindle which can be positioned in 3 axes and a pivot bridge pivotable about an A axis with a round table for mounting a workpiece pallet supporting a workpiece. Furthermore, in front of the pivot bridge, a mount is provided for a processed workpiece or workpiece to be processed located on a workpiece pallet. Between the mount and the pivot bridge a pallet changer is provided which can only perform a vertical displacement movement and a pivot movement about a vertical axis. Workpiece pallets are picked up and put down only during the vertical displacement movement of the pallet changer, or possibly by pivoting the pivot bridge about the A axis.

A horizontal machining center serving as a machine tool includes: a bed; a front-side guide rail shaped to extend linearly along an upper surface of the bed and attached to the bed; and a column provided on the upper surface of the bed and fixed to the bed. The column has a facing portion arranged to face an end of the front-side guide rail in an X-axis direction in which the front-side guide rail linearly extends. The facing portion is provided with a hole through which the front-side guide rail can be inserted. By such a configuration, a machine tool with excellent workability during removal of an elongate body is provided.

Disclosed is a five axis machining apparatus. The five axis machining apparatus comprises a base member, a support member, a stationary base, a first moving plate, a second moving plate, a third moving plate, a fourth moving frame, a fifth moving frame and a controller (not shown). The five axis machining apparatus is designed to hold together A, C and X axes thereby resulting in a reduced size without compromising on rigidity that is required for processing metallic job components. The five axis machining apparatus allows independent as well as simultaneous control of X, Y, Z, A and C axes.