Abstract: A table group for a machine tool is provided. The table group has a support assembly, a table, a ring gear provided with a lower face and an upper face, integral with the table, a plurality of main hydrostatic skids, a detection device for detecting a lifting action generated by the main hydrostatic skids, a plurality of dogs and an electronic management device operatively connected to the main hydrostatic skids, the dogs and the detection device, configured to control the dogs to generate a contrasting action. The lifting action is equal to a predetermined constant nominal load greater than the weight of a semi-finished product and either smaller than or equal to a maximum load which can be borne by the main hydrostatic skids.

Abstract: A machine tool for chip removal processing has an upright, a bench and a machining group. The upright has a prevailing extension along a vertical axis orthogonal to a base plane, a front side lying on a front upright plane and a rear side lying on a rear upright plane. The front and rear sides are connected to each other by a right side and a left side. The bench has a prevailing extension along a longitudinal axis and is suitable to be fixed to the base plane. The machining group, connected to the upright to be translatable along the vertical axis and an advancement axis, is suitable to perform chip removal operations on a workpiece. The upright has a front pair of vertical translation means and a rear pair of vertical translation means that adjust vertical translation of the machining group and keep the machining group orthogonal to the vertical axis.

Abstract: A table assembly for a machine tool is provided. The table assembly has a slide, a rotatable table and a table rotation mechanism placed on board the slide and adapted to be driven to rotate the table about a vertical axis. The table rotation mechanism has at least one rotation assembly engaged with a ring gear of the table. The at least one rotation assembly has a torque motor having a vertical motor axis and a reduction gear having an inlet engaged with the torque motor, and an outlet pinion engaged with the ring gear of the table, coaxial to the motor axis. The machine tool is a milling machine or a gantry boring machine.

Abstract: A table group for a machine tool is provided. The table group has a support assembly, a table, a ring gear provided with a lower face and an upper face, integral with the table, a plurality of main hydrostatic skids, a detection device for detecting a lifting action generated by the main hydrostatic skids, a plurality of dogs and an electronic management device operatively connected to the main hydrostatic skids, the dogs and the detection device, configured to control the dogs to generate a contrasting action. The lifting action is equal to a predetermined constant nominal load greater than the weight of a semi-finished product and either smaller than or equal to a maximum load which can be borne by the main hydrostatic skids.