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"e" with metric tolerance
i am looking for an explanation of the use of the letter e in a circle following a metric tolerance (h6) on a german drawing
check out our whitepaper library.
revision?
in the military/defense world we put this symbol on our drawings to indicate what the changes were on each revision.
here is an example of a milspec bolt
it does not appear to be a rev
drbauer
circle(e) in iso signifies the "envelope principle" which suspends the iso "independency principle" for measurement of size and form and invokes conditions equivalent to the asme "taylor principle, rule #1" commonly known as "perfect form @ mmc".
paul
promoting, selling, recruiting and student posting
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title: drafting standards,
description: drafting standards, gd&t & tolerance analysis technical support forum and mutual help system for engineering professionals. selling and recruiting forbidden.

2009-09-05, 10:35 AM	#1
huangyhg 超级版主注册日期: 04-03 帖子: 18592 精华: 36 现金: 249466 标准币资产: 1080358888 标准币	e with metric tolerance "e" with metric tolerance i am looking for an explanation of the use of the letter e in a circle following a metric tolerance (h6) on a german drawing check out our whitepaper library. revision? in the military/defense world we put this symbol on our drawings to indicate what the changes were on each revision. here is an example of a milspec bolt it does not appear to be a rev drbauer circle(e) in iso signifies the "envelope principle" which suspends the iso "independency principle" for measurement of size and form and invokes conditions equivalent to the asme "taylor principle, rule #1" commonly known as "perfect form @ mmc". paul promoting, selling, recruiting and student posting are not allowed in the forums. (add stickiness to your site by linking to this professionally managed technical forum) title: drafting standards, description: drafting standards, gd&t & tolerance analysis technical support forum and mutual help system for engineering professionals. selling and recruiting forbidden. __________________ 借用达朗贝尔的名言：前进吧，你会得到信心! [url="http://www.dimcax.com"]几何尺寸与公差标准[/url]