Multiple geometric controls---Perpendicularity and Flatness callout

[SeasonLee]

Last week I learned that the parallelism tolerance value cannot be small than the flatness tolerance value from this thread---Parallelism to cast surface designated as datum, now I am wondering on the perpendicularity and flatness callout is legal or illegal as shown on this attached figure.

Thanks for all comments

Season

 

[Belanger]

The picture you attached falls under the same idea -- since perpendicularity of a surface already controls the flatness to the given value (.0005), then the flatness callout (.001) makes no sense.

John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems

 

[SeasonLee]

Great, Thank lot, J-P

Season