A table group for a machine tool intended to rest on a horizontal reference plane, comprising: - a support assembly comprising a support comprising an annular wall delimiting an inner compartment ; - a table supported by the support assembly , rotationally about a vertical rotation axis (C); - a main biasing portion (20; 120) provided with a lower face and a secondary biasing portion (20;220) provided with an upper face (20",220"), which are joint with the table ; characterised in that it further comprises - a plurality of main hydrostatic skids , fixed to the support assembly , adapted to support the table by means of pressurized fluid, thus generating a lifting action (F1), each main skid being configured to form a main pressure chamber with the lower face (20';120') of the main biasing portion (20;120), in which a meatus which supports the table is formed; - detection means adapted to detect the lifting action (F1) generated by the main skids ; - a plurality of dogs fixed to the support assembly , adapted to push the table towards the main skids by means of pressurized fluid, thus generating a contrasting action (F2), wherein each dog comprises a hydrostatic secondary skid , each secondary skid being configured to create a secondary pressure chamber with the upper face (20";220") of the secondary biasing portion (20;220), in which a meatus which pushes the table towards the main skids is formed; - electronic management means operatively connected to the main skids , the dogs and the detection means, configured to control the dogs so as to generate a contrasting action (F2) such that the lifting action (F1) is equal to a predetermined constant nominal load (P*), which is greater than the weight of the semi-finished product and either smaller than or equal to a maximum load (Pmax) which can be borne by the main skids . - a support assembly comprising a support comprising an annular wall delimiting an inner compartment ; - a table supported by the support assembly , rotationally about a vertical rotation axis (C); - a main biasing portion (20; 120) provided with a lower face and a secondary biasing portion (20;220) provided with an upper face (20",220"), which are joint with the table ; - a plurality of main hydrostatic skids , fixed to the support assembly , adapted to support the table by means of pressurized fluid, thus generating a lifting action (F1), each main skid being configured to form a main pressure chamber with the lower face (20';120') of the main biasing portion (20;120), in which a meatus which supports the table is formed; - detection means adapted to detect the lifting action (F1) generated by the main skids ; - a plurality of dogs fixed to the support assembly , adapted to push the table towards the main skids by means of pressurized fluid, thus generating a contrasting action (F2), wherein each dog comprises a hydrostatic secondary skid , each secondary skid being configured to create a secondary pressure chamber with the upper face (20";220") of the secondary biasing portion (20;220), in which a meatus which pushes the table towards the main skids is formed; - electronic management means operatively connected to the main skids , the dogs and the detection means, configured to control the dogs so as to generate a contrasting action (F2) such that the lifting action (F1) is equal to a predetermined constant nominal load (P*), which is greater than the weight of the semi-finished product and either smaller than or equal to a maximum load (Pmax) which can be borne by the main skids . <EOS>