hexagon symbol on a drawing

[idanbrk]

hi all,

i recently received a drawing of a part that had a hexagon shape , the guy who made this drawing used a symbol to indicate that this is a hexagon, you can see an example of the symbol he used in the attached file, it looks like the diameter symbol but with a hexagon instead of a circle, my question is if this is a valid symbol to use in a drawing? (according to iso or asme )

thanks.

 

[CheckerHater]

No

"For every expert there is an equal and opposite expert"
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[idanbrk]

what about this? (attached file)

 

[JNieman]

If you are going to make up your own symbols, you need to include some form of legend. That said, I would not create such a symbol unless you were making a whole library of hexagonal parts and the redundancy has merit, but even then I'd be hesitant.

As for your bolt dimension template, you should not base a manufacturing drawing off of that precedent. It is a general reference-only diagram. The actual tolerances and dimensions are controlled by the various ANSI/ISO/Whatever standards the bolt claims to be made in compliance with. The diagram is providing a reference for people to know about very general sizes.

To dimension the hexagon, you'd probably need to specify either the inscribed or circumscribed diameter, and dimension a face and angle to establish a tolerance (with the number of places (6) called out). There may be a more elegant way, but that's my off-the-cuff Monday-morning suggestion.

_________________________________________
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[CoryPad]

For drawing requirements, here is an example from ASME B18.2.6:

 

[CheckerHater]

If you are going to make up your own symbols, you need to include some form of legend.

Which will immediately rise the question "What is legend?": thread1103-391205


"For every expert there is an equal and opposite expert"
Arthur C. Clarke Profiles of the future