QMSYS Tolerances and Fits


The software QMSys Tolerances & Fits is an engineering program, which saves time and prevents human errors in determining nominal and limit values of machine parts. It can be used to choose a fit and determine tolerances and deviations of machine parts according to the following international and national standards: – ISO 286, EN 20286, ANSI B4.2, GOST 25346 for nominal dimensions up to 3150mm – DIN 7172, GOST 25348 for nominal dimensions over 3150mm up to 10000mm – ANSI B4.1 for nominal dimensions up to 200 inch – ISO 2768-1 for nominal dimensions without individual tolerance indications up to 3150mm Using the QMSys Tolerances & Fits software the following tasks can be solved: – Selection of suitable sizes from the preferred number series R5 to R80 according to ISO 3, ANSI Z17.1 – Selection of suitable fits according to ISO 1829, ISO 286, DIN 7154, DIN 7155, DIN 7157 or ANSI B4.1 – Design of a ISO fit according to ISO 286 for given clearance or interference respectively – Determination of dimensional tolerances and deviations of machine parts – Calculation of bilateral symmetrical tolerances for CNC-programs – Determination of non-prescribed limit deviations according to ISO 2768. The fit design is processed automatically and after its completion, the calculation provides the user with a set of fits whose parameters meet the entered requirements. Key Benefits: – Minimization of engineering time required to specify tolerances, fits and plane gauges – The software promotes specification of standard hole and shaft sizes, tolerances and fits to help lower operating cost – Calculation reports in TXT, RTF, XML, XLS or HTML format – Information is provided in both inches and millimetres – Multi-language flexible and user-friendly interface The full version of the software can be evaluated free of charge for a trial period with a time duration of 1 month.

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