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majkus

Datum location GD&T

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Hello,

There is difference.

First picture mean reference surface A and flatness 0.05

Second picture mean flatness 0.05 is reference to surface A. On second drawing need to add surface A where is. 

 

Thanks

Stanislav

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Hi

As per me both pictures resembles the same thing. Datum A is depicted on the plane where it is shown in picture 1 and later in picture 2, flatness is applied to the surface and the same surface is Datum A.

@Stanislav I feel your statement that " Second picture mean flatness 0.05 is reference to surface A" might not be correct. As per my understanding Flatness is Datum independent. Correct me if I am wrong.

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