Abstract: An apparatus for the proper shaped cutting of alternate components of sheet material fittings for subsequent joining as ductwork. The apparatus comprises a main support platform defined by a rectangular peripheral frame of side beams and end beams and a cutter head movably arranged over the platform to cut sheet material on the platform. A first shuttle table for receipt of a first piece of sheet material is supported on the platform. A second shuttle table for receipt of a second piece of sheet material is also supported alternately, on the platform. A roller bearing set is arranged on the platform to permit one of the shuttle tables to be moved onto the platform as the other of the tables is moved from the platform, to permit alternate pieces of sheet material to be cut by the cutter head over the platform in sequence with one another.