Profile Surface & Profile Line 1

[Luisen]

Hello everybody, who know wich is the diference between Profile Surface or Profile Line, i know Profile Surface, but, iam not sure of Profile line, and i dont know exactly when we must use this tolerance, and how we must apply it.

 

[solid7]

Profile of a surface is a tolerance that applies over an entire surface, relative to the specified datum. Profile of a line applies ONLY in a planar section of a surface, relative to the specified datum.

So to put that in real world terms - if you were to put a part on a CMM, surface profile would indicate a complete inspection of the surface, or a complete inspection within a specified boundary. For profile of a line, you would measure along the surface in a planar attitude - could be an offset, tabulated coordinate, etc. Surface and line profile are very similar to the idea of runout, and total runout, but applied to non-cylindrical parts.


Example of surface profile: aero surfaces, (generally +/- .030")

Examples of line profile: critical (mating) interface (generally +/- .005")

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[Luisen]

Thanks Solid¡¡¡