Our experience with US and Euro firms & drawings indicates that there is almost no difference between ASME and ISO drawing standards other than 1st vs. 3rd angle projection. There are however some style differences (we do it this way, they do it that way, etc).
On PDM ... Solidworks PDMworks...
Thanks Drawoh and ctopher ...
You're right, "centerline datum" is misleading, I meant it to be based on a surface feature (diameter), poor choice of words perhaps. Also thanks for the reference to section 6.8 ... I missed that one previously and it's helpful.
cd
For long slender rolls, according to ASME Y14.5, does the centerline "datum" follow the natural deflection of the roll due to gravity or is it a theroretical straight line? For example, in a free state a 2" diameter roll 40" long sags about 2-3 thou under its own weight. A cylindricity req'mt...
