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What is ISO 14405 and how to download it as a PDF?


What is ISO 14405 and how to download it as a PDF?




ISO 14405 is a series of standards that specify geometrical product specifications (GPS) for dimensional tolerancing. It defines different types of linear and angular sizes and their tolerances, as well as the rules and principles for indicating them on technical drawings. ISO 14405 consists of the following parts:


Iso 14405 E Pdf Download


Download: https://www.google.com/url?q=https%3A%2F%2Furluso.com%2F2tGxz8&sa=D&sntz=1&usg=AOvVaw3Z26uTtxQmt1JrYsSZv85m



  • Part 1: Linear sizes



  • Part 2: Dimensions other than linear or angular sizes



  • Part 3: Angular sizes



ISO 14405 is intended to be used in conjunction with other GPS standards, such as ISO 8015 (fundamental rules), ISO 286-1 (tolerance classes), ISO 14253-1 (decision rules), and ISO/TS 17450-2 (general concepts).


To download ISO 14405 as a PDF, you can visit the official website of ISO (the International Organization for Standardization) at https://www.iso.org/obp/ui/. There you can search for the specific part of ISO 14405 that you need and purchase it online. Alternatively, you can also access ISO 14405 through other online platforms that offer standards publications, such as iTeh Standards Store or ILNAS e-Shop. However, these platforms may charge different fees or require registration to access the PDF files.


One of the main benefits of using ISO 14405 is that it provides a clear and unambiguous way of specifying dimensional tolerances for various types of features of size. For example, it defines different types of specification operators for linear sizes, such as:


  • the default specification operator, which is based on the two-point size concept and applies to cylindrical and planar features;



  • the maximum material size (MMS) specification operator, which is based on the envelope requirement and applies to cylindrical features;



  • the minimum material size (mms) specification operator, which is based on the envelope requirement and applies to planar features;



  • the local size specification operator, which is based on the local size concept and applies to cylindrical and planar features;



  • the global size specification operator, which is based on the global size concept and applies to cylindrical and planar features.



By using these specification operators, the designer can indicate the functional requirements of the feature of size and the verification method to be used. ISO 14405 also provides examples and illustrations of how to apply these specification operators in different situations.


Another benefit of using ISO 14405 is that it harmonizes the dimensional tolerancing of linear and angular sizes with other GPS standards. For example, it is compatible with ISO 1101 (geometrical tolerancing), ISO 5459 (datums and datum systems), ISO 8015 (fundamental rules), and ISO 17450 (general concepts). This means that the designer can use a consistent and coherent system of GPS to specify the geometrical requirements of a product.


ISO 14405 also provides guidance on how to deal with some common issues and challenges in dimensional tolerancing, such as:


  • how to specify dimensions and tolerances for features of size that are not cylindrical or planar, such as conical, spherical, or toroidal features;



  • how to specify dimensions and tolerances for features of size that are derived from other features, such as midpoints, centre lines, or axes;



  • how to specify dimensions and tolerances for features of size that are related to other features, such as coaxiality, parallelism, or symmetry;



  • how to specify dimensions and tolerances for features of size that are affected by form deviations, such as roundness, straightness, or flatness;



  • how to specify dimensions and tolerances for features of size that are affected by orientation deviations, such as inclination or tilt;



  • how to specify dimensions and tolerances for features of size that are affected by location deviations, such as position or run-out.



By following the rules and principles of ISO 14405, the designer can avoid ambiguity and confusion in the specification and verification of dimensional tolerances. 29c81ba772


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