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...Manufacturing technology introduction gears are used extensively for transmission of power they find application in automobiles gear boxes oil engines machine tools industrial machinery agricultural geared motors etc to meet the strenuous service conditions should have robust construction reliable performance high efficiency economy and long life also be fatigue free from stresses avoid their frequent failures drives form noise chatter ensure load carrying capacity at constant velocity ratio all above manufacture has become a highly specialized field materials process various include wide variety cast irons non ferrous selection depends upon type peripheral speed degree accuracy required method dimensions weight drive allowable stress shock resistance wear can divided into two categories forming machining consists direct casting molding drawing or extrusion tooth forms molten powdered heat softened involves roughing finishing operations is where material drawn through die giving new cr...