I have been the chairman of ISO TC 213 since 2008. The ISO-GPS language is defined in a number of ISO standards developed by ISO Technical Committee 213 "Dimensional and geometrical product specifications and verification". Some of the more well-known ISO GPS standards are: ISO 1101 - Geometrical Tolerances, ISO 5459 - Datums, ISO 14405-1 - Size, ISO 1302 - Surface Finish and ISO 8015 - Fundamental Principles. It defines the nominal geometry of the components that make up the product, and the tolerances that quantify the allowable deviations from this nominal geometry. Geometrical Product Specifications (GPS) is the international symbol language used to express tolerances in technical drawings. DIN EN ISO 5459 - DRAFT Draft Document - Geometrical product specifications (GPS) - Geometrical tolerancing - Datums and datum systems (ISO/DIS 5459.2:2017) German and English version prEN ISO 5459:2017.
#Iso 5459 series#
This is the first of a planned complete series of courses on ISO GPS (some free, some not) that will cover all aspects of the ISO GPS language, as well as a systematic procedure for applying GPS tolerancing to drawings. Finally, the course summarizes the advantages companies introducing systematic GPS can expect.
Using the same example it demonstrates the advantage of systematic GPS tolerancing, where the primary tolerancing is geometrical tolerancing and dimensional tolerancing is only used to tolerance features of size. It explains the shortcomings of dimensional tolerancing and hybrid tolerancing where geometrical tolerancing is used as Band-Aids to try to fix dimensional tolerancing using a simple, straightforward example. The course gives an overview of why tolerancing has changed over time. ISO 5459:1981 Technical drawings Geometrical tolerancing Datums and datum-systems for geometrical. It helps products to be made more easily and efficiently, using fewer resources in the process. ISO GPS is an effective communications link, even when the designer and supplier do not have a common language. This global specification language enables a drawing of a component developed in one country to be sent to another country, where it can be understood and the component manufactured. Any time a design has to be captured and communicated, it is done using ISO GPS.
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