Dimension with Equal Sign on either side 1

[Roboeng99]

I have received prints from a customer that had equipment designed in Europe. There is a dimension scheme on the page that I have not seen before and can not find a ISO standard that discusses it. It is a linear dimension between to cylindrical features (hole or boss) and on either side of the dimension it has two parallel lines going horizontally. See attached image. My assumption is that it is some kind of parallelism instruction. Could someone please help me understand the meaning.

 

[CheckerHater]

Link doesn't work

"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future

 

[djhurayt]

There does not seem to be any attachment. But if I am imagining correctly what I think you are talking about is a dimension where the alpha/numeric characters looks like

= 5.00 =

I don't think this is in any international standard but I have seen this on a number of prints coming out of Europe. It combines with a centerline to imply symmetry about the centerline. So that the perfect part will have one feature that is exactly 2.5 units to one side and the other side is also exactly 2.5 units from the centerline on the "perfect part".

david

 

[sammcc]

we call this equal equal and use it quite a lot especially for precision work like jigs and fixtures.