ISO 2768 standard is a creation of the International Organization for Standardization (ISO). Like for any other standard of this nature, the technical committee was the team behind this work. Other participants in this process were international organizations, governmental organizations, NGOs and other interested parties.
Fornominalsizesbelow0.5mm,thelimitmeasuresareusuallyindicateddirectlyatthe nominalmeasure.IfgeneraltolerancesaccordingtoISO2768-1arevalid,thefollowing.
This standard, generally titled “General Tolerances”, consists of two parts:
Below is a breakdown of the contents of each of these sections of the standard.
Part 1: ISO 2768-1
This part of the standard has the crucial role of simplifying drawing indications. As mentioned in the introduction, this section deals with general tolerances for angular and linear dimensions. Note that dimensions should not have individual tolerance indication.
The seven topics covered in this document are:
Part 1 applies to three dimensions as listed below:
Dimensions not covered in this part of the standard are:
Under the general section, this part of the standard reiterates the importance of workshop accuracy in determining tolerance class. The section also explains when reference should be made to the standard and when to revert to International Standards.
General Tolerance Din Iso 2768-1m
Normative references are formal parts of the standard. By the time of publishing this standard, the two International Standards recognized by ISO and IEC were IS0 8015 and ISO 2768-2.
For general tolerances for angular and linear dimensions, the document provides some guidelines. You can find these degree/ millimeter values in Tables 1, 2 and 3 of the standard.
You will find Annex A of the document very useful. All sections of the annex (A1-14) mostly expound on general tolerances, with A3 listing the following advantages of general tolerances:
Part 2: ISO 2768-2Din Iso 2768 1 M
Similar to Part 1, this separate document of the standard has several topics as listed below:
Part 2 of the standard is concerned with drawing features that are devoid of individual indication. It mainly covers features that arise when material is removed from a component. Tables are also included to describe geometrical tolerances for several single features such as flatness & straightness, cylindricity and circularity. Related features covered in this part of the standard are parallelism, perpendicularity, coaxiality and circular run-out.
The document also comes with Annex A and Annex B to provide further information. Annex B provides important further information on General Geometrical Tolerances, Circularity, Cylindrity and Parallelism. Others are Symmetry and Example of Drawing.
Iso 2768 Ml
As you plan to get hold of this part of the standard, you may want to look at equivalents and identical standards. One of near identical standards is the PN EN 22768-2 of 1999. The Polish Committee for Standardization published this document that focuses on limits and fits. An equivalent of the document is the BS EN 22768-2:1993 that was published by the British Standards Institution.
Examples of other equivalent standards are:
ISO 2768 CertificationIso Tolerance 2768 15
When two parts of a mechanical system need to merge to fulfil a certain role, correct tolerancing is of utmost importance to ensure a good mechanical design. Remember that each component bears features with a geometrical shape and size. Deviations related to geometrical characteristics and size need to have a limit to maintain proper function of the component. Therefore, complete tolerancing is necessary on the drawing. In other words, judgment or any form of guesswork should not be part of inspection or workshop processes. Applying general tolerances is the best way of ensuring this condition is met.
Iso 2768 Standard
Apart from enhancing technology standardization, ISO registration builds customer trust and grows your business. Order rejection should be outdated with this kind of flaw-preventing standard. You have probably seen some products with ISO quality marks. You can attain this through ISO 2768 certification. Find out from your local regulatory agency how you can get started.
Comments are closed.
|
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |