what is center assembly constrain used for in unigraphics?

i generally use touch align then infer center/axis for cylindrical mating.

3 Answers

The center mating option you're referring to can be used for centralising cylindrical geometry in a square hole when there is clearance between the faces or a square insert in a square pocket that also has clearance between the faces.

watch the below link..you will get understand,,

http://www.youtube.com/watch?v=-YOHTigQUN4&feature=youtu.be

If one oblong hole and another is just simple hole,so ,if we want to contrained in such sitituation we are use center command