Tables are also included to describe geometrical tolerances for several single features such as flatness & straightness, cylindricity and circularity. It mainly covers features that arise when material is removed from a component. Part 2 of the standard is concerned with drawing features that are devoid of individual indication. Similar to Part 1, this separate document of the standard has several topics as listed below: more effective order negotiation by supply engineers.
time savings because lengthy tolerance calculations are unnecessary.more effective communication through drawings.All sections of the annex (A1-14) mostly expound on general tolerances, with A3 listing the following advantages of general tolerances: You will find Annex A of the document very useful. You can find these degree/ millimeter values in Tables 1, 2 and 3 of the standard.
#Iso 2768 mk iso#
By the time of publishing this standard, the two International Standards recognized by ISO and IEC were IS0 8015 and ISO 2768-2.įor general tolerances for angular and linear dimensions, the document provides some guidelines. Normative references are formal parts of the standard. The section also explains when reference should be made to the standard and when to revert to International Standards. Under the general section, this part of the standard reiterates the importance of workshop accuracy in determining tolerance class.
Note that dimensions should not have individual tolerance indication. As mentioned in the introduction, this section deals with general tolerances for angular and linear dimensions. This part of the standard has the crucial role of simplifying drawing indications.