Hexagon Symbol on drawing
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Posted by: dansensel ® 03/23/2007, 11:48:01 Author Profile eMail author Edit

i have came across a hexagon symbol on a drawing. i can't get an image scanned in to post here but it is a small hexagon attached to a dimension on an old machining print. the hexagon is equallatteral and has no letters inside of it. Hope somebody out there knows what is means.

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Re: Hexagon Symbol on drawing
: Hexagon Symbol on drawing -- dansensel	Post Reply	Top of thread	Forum

Posted by: Marky ® 03/28/2007, 11:35:02 Author Profile eMail author Edit

That's Cool!! Glad you've solved it. I interviewed a engineer several years ago...he worked for Smith & Wesson...he had worked on a drawing still in use from the 1890's....it was only on Rev 2..(only kiddin') I'll kindly pay you Tuesday..for a hamburger today....Whimpy

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Re: Hexagon Symbol on drawing
: Hexagon Symbol on drawing -- dansensel	Post Reply	Top of thread	Forum

Posted by: dansensel ® 03/27/2007, 22:32:24 Author Profile eMail author Edit

We found in on another drawing. It turned out that it was a flag note. Note was wdeleted on first drawing. That is what happens with several revisions of 50yr old drawings.

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Re: Hexagon Symbol on drawing
: Hexagon Symbol on drawing -- dansensel	Post Reply	Top of thread	Forum

Posted by: aardvark ® 03/27/2007, 18:36:00 Author Profile eMail author Edit

A hexagon is usually a revision symbol.

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Re: Hexagon Symbol on drawing
: Hexagon Symbol on drawing -- dansensel	Post Reply	Top of thread	Forum

Posted by: marky ® 03/23/2007, 12:43:34 Author Profile eMail author Edit

Is it a hexagon shaped parts? I'll kindly pay you Tuesday..for a hamburger today....Whimpy

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Re: Re: Hexagon Symbol on drawing
: Re: Hexagon Symbol on drawing -- marky	Post Reply	Top of thread	Forum

Posted by: dansensel ® 03/23/2007, 12:44:48 Author Profile eMail author Edit

No. The part is not hexagon shaped. It is a complex machining of a complex casting.

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Re: Re: Re: Hexagon Symbol on drawing
: Re: Re: Hexagon Symbol on drawing -- dansensel	Post Reply	Top of thread	Forum

Posted by: Kelly Bramble ® 03/23/2007, 17:02:08 Author Profile eMail author Edit

If I had to guess, maybe a company logo. I would ask the person responsible for the engineering drawing.

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: Re: Re: Re: Hexagon Symbol on drawing
: Re: Re: Re: Hexagon Symbol on drawing -- Kelly Bramble	Post Reply	Top of thread	Forum

Posted by: dennisparr ® 02/05/2008, 10:26:49 Author Profile eMail author Edit

Per ANSI standards a hexagon is used to indicate a feature or dimenion that has critical note related to it. In the notes area the note should have a hexagon around it as well. Example, note one has a hexagon around it indicating the surface finish required for the machined feature. The hexagon by the feature should have the number one in it as well. However, some people just place the hexagon and do not indicate the note it is meant for. Revision symbols per ANSI standards are to be triangles. A hexagon would be used if an ECN/ECO (engineering change notice / engineering change order) system has been implemented by the company. Then a ECN/ECO number would be listed in the revision block and only the single revision letter would be used. Example, revision E, ECN #123456, hexagons with the letter E appear next to each dimension effected by the revision. To find out what the revisions are ECN #123456 would have to be looked up. If no ECN/ECO system is in place then a revision triangle for each revision should appear. Example, 5 dimensions were changed. Then there should be an E1, E2, E3, E4, and E5 revision listed in the revision block with the trianlge next to the dimension effected. Note, an ECN/ECO system is only required if a company has implement procedures for ISO certification for the engineering department and design groups.

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