Abstract: The machine tool (1) having a work head (9) adapted to support a tool (21), a workpiece holder (30) having a two substantially parallel beams (31) arranged at a distance adjustable orthogonally to the longitudinal extension of the beams, a carriage (35) on each beam (31) movable along the longitudinal extension of the beam (31), on each carriage (35) a suction cup (39) for blocking the workpieces (P) to be machined. The position of each suction cup (39) with respect to the carriage (35) onto which the cup is mounted is adjustable by rotating around an axis (D-D) which is substantially orthogonal to a blocking surface, for blocking the workpieces, defined by the suction cups (39). To each suction cup (39) an actuator (46, 48) is associated, controlling the rotation of the suction cup (39) with respect to the carriage (35) onto which the cup is mounted.

Abstract: A machining center, comprising: a number N of workpiece tables equal to or greater than three, a number N of first guides, which extend parallel to a first direction; along said first guides being movable respective to workpiece tables, one for each first guide, a number N?1 of second guides, which extend parallel to a second direction transverse to said first direction, a number N?1 of machining groups each comprising at least one machining head; each machining group being movable parallel to said second direction along a respective second guide; a number N×(N?1) of machining areas wherein the machining groups can operate on workpieces present on said tables; along each first guide, or for a respective table, there being present N?1 machining areas, one for each machining group, so that each machining group can operate, according to a programmed work cycle, on all said N workpiece tables, a number N of workpiece loading/unloading areas, one for each workpiece table.