v =very coarse to EN 22768-2:1993 (the European equivalent to ISO 2768) that explains this further.Look at the tables, and locate the rows marked 'm' (medium) and these will give you the applicable general tolerances. Dimensions without tolerance to ISO 2768-m (All dimensions in mm) That means that you need to look at DIN ISO 2768-1.Masse ohne toleranzangabe nach DIN ISO 2768-m.Thanks again, Tim Tim, I am looking at a German/USA print. I apologize if I seem a bit thick, but I have only recently been confronted with prints from customers invoking the 2768 standard. Stijloor, As you indicated, I would expect to see the tolerance class callout somewhere in the title box.

What is the significance of these alphas? Material type)? One more thing, I've seen 'ISO 2768' followed by various alpha characters ('mH', 'mk', 'm'). 'Class', 'Group')? Also, in the absence of any class indication, is there a default based on something else (i.e. Should I find something like a 'Tolerance Class:M' cell within the title box? Is there something else the individual cell might be labeled (i.e. Very common on DIN and ISO-standard based drawings. The class of the general tolerance applied is typically called out in the title box on the drawing.

Thanks, Tim Tim, You may already have seen. Where would the tolerance class callout typically on the drawing? Any help is appreciated. The latest DIN standard sheet version applies to all parts made to DIN standards.Īll, I have recently been dealing with prints that call out ISO 2768 (mH)? While I am familiar with the concept and practices of the tolerancing as described, I'm having trouble determining which class is being invoked. General Tolerances to DIN ISO 2768 T1 and T2. GENERAL TOLERANCES FOR FORM AND POSITION (DIN ISO 2768 T2).

Din iso 2768 t2