In engineering drawings, and for the untoleranced dimensions, the medium level is usually used ( "m" for the first sub-standard and "k" for the second sub-standard), and that can be expressed by writing the following in the title box: ISO DIN 2768 - mK. This sub-standard the values of general tolerances in regard of form and posistion according to three classes or levels: H (fine), K (medium), L (coarse). This sub-standard determines the values of general tolerances of the linear and angular dimensions and radius of curvature and chamfer height according to four classes of levels: f (fine), m (medium), c (coarse), v (very coarse). This standard consists of two sub-standards: DIN ISO 2768-1:1991-06 Allgemeintoleranzen fr Lngen- & Winkelmae, 4 Toleranzklassen zur Vereinfachung von Zeichnungen. Powered by Create your own unique website with customizable templates. The latest DIN standard sheet version applies to all parts made to DIN. By choosing the tolerance class precision levels common in workshops should be taken into account. It's used to simplify the engineering drawings in case of determining the mechanical tolerances for parts' dimensions which are manufactured by machining means. Maryland Metrics Technical Data Chart: General Tolerances to DIN ISO 2768 T1 and T2. According to DIN ISO 2768-2 General tolerances for linear measures and level squares with four tolerance classes are useful for simplifying drawings. This standard determines the general tolerance values for the untoleranced linear and angular dimensions and also for the form and position tolerances. The standard ISO DIN 2768 is a standard has been issued by the International Organization for standardization - ISO in association with Deutsches Institut für Normung - DIN.
0 kommentar(er)
