Positioners with a rotary plate (table) for effective handling when welding components up to 3 tons in weight. The axis of rotation of the positioner is continuously adjustable from horizontal to vertical position incl. height adjustment of the table. Tilting and adjustment of the table height is hydraulic. For clamping the welded parts, the positioner includes a clamping face plate with T-slots (M20). The device can be equipped with an interface for pneumatic clamping and other equipment according to customer requirements.