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How To Dimensioning Internal Features of a Shaft

How To Dimensioning Internal Features of a Shaft

How To Dimensioning Internal Features of a Shaft

I seemed to have kicked off a little debate in work. I have a shaft/cylinder part where some internal features need to be dimensioned. I run a section through the entire cylinder, but an engineer said that it's incorrect. He said that running a section through a cylinder goes against convention and the standard. The engineer said he thought the features should be dimensioned against the hidden lines.

Can I get some advice on what the standard is when dimensioning features inside a shaft?

RE: How To Dimensioning Internal Features of a Shaft

Curious if your colleague can cite an actual standard. I doubt it.

Your colleague is backward. The opposite is true. One should avoid dimensioning to hidden lines.

RE: How To Dimensioning Internal Features of a Shaft

ASME Y14.5-2009 Section 1.4 Fundamental Rules

Fundamental Rule (g) : Dimensions should be arranged to provide required information for optimum readability. Dimensions should be shown in true profile views and refer to visible outlines.

RE: How To Dimensioning Internal Features of a Shaft


In the linked Eng-Tips discussion, I pointed out the use of the word "should" as opposed to "shall".


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