IS THERE ANY NORTH AMERICAN STANDARD THAT SPECIFY HOW MANY POINTS ARE REQUIRED TO MEASURE A FEATURE USING CMM MACHINE. I HEARD THE BRITIS STANDARD BS7172 SPECIFIES THIS REQUIREMENT FOR EXAMPLE 9 POINTS FOR A SURFACE 15 POINTS FOR A CYLINDER.
In Fig. 6-52 page 194 the datum D is referenced by itself in the 0.05 runout callout (See the attachment) is it similar to my case?http://files.engineering.com/getfile.aspx?folder=e8c121c0-38da-4766-821c-7d9438eb0653&file=Sample.bmp
Hi Dave,
I agree with you regarding the callout. I just can't find the item in ASME that backs it up.
I am dealing with a tough checker and definition of runout is not clear on this issue.
Thank you,
Kaveh
Hi,
I am working on a legacy drawing that I am reviewing for GD&T correctness. This part is a shaft that is calling for circular runout on the OD surface referenced to shaft dia as reference datum(please see the attachment). I know better ways of controlling this shaft but I can only change it...
