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An interactive tolerance system

The proper distribution of tolerances among the components of an assembly is necessary to ensure that the product would meet the desired design specifications at the lowest possible cost. Typically, designers have to manually determine the desired tolerances of a product to input into a CAD system. This paper describes an Interactive Tolerance System (ITS) designed to allow users to interactively select the appropriate class of fit and perform tolerance analysis for an assembly. The ITS is written in C programming Language for a micro-computer and can be interfaced with CAD software, such as AutoCAD and CADkey. With ITS, the productivity of designers is enhanced and design for manufacturability is easier to achieve.