This design is reverse engineered from an actual gearbox that controls the opening of a size 700mm gate valve. Dimensions are accurate and can be used to manufacture a working gearbox.Solidworks 2020 is the native file format, with all parts editable and properly defined in terms of sketches, features and mechanical mates in the assembly.Animation for the gear motion is included in the assembly file, which is used to generate the video included in the youtube preview.As for the specifications for this particular gearbox: