huangyhg

leader line convention
being an electrical engineer with limited knowlede of drafting conventions, i need help resolving the correct method of indicating radius location for a metal panel.
i have a 2" x 5" metal panel. the panel has a 1.9" x 4.9"
milled out area with a 1/4" radius corners on the milled out area.
is it ok to have an external leader line pointing to the milled out radius or does the leader line have to begin internally, as to not confuse the machinist into radiusing the 4 outer corners of the part as well?
is either convention acceptable?
thanks
eng-tips forums is member supported.
either convention is acceptable. it is better to have no dims within the part, except where clarity is at issue.
i would probablly put 1 leader off of one of the 4 radius corners, leaving the dim inside the sketch of the part.
marking as 4x r.25...
but hey, thats just me.
wes c.
whatever is more clear on the dwg. i usually have it on the inside, but depending on the scale of the dwg you may have to show it on the outside. either is correct.
chris
sr. mechanical designer, cad
solidworks 05 sp3.1 / pdmworks 05
you could also make a detail view of the cutout that would eliminate any confusion
best regards,
heckler
sr. mechanical engineer
sw2005 sp 4.0 & pro/e 2001
dell precision 370
p4 3.6 ghz, 1gb ram
xp pro sp2.0
nivida quadro fx 1400
o
_`\(,_
(_)/ (_)
"there is no trouble so great or grave that cannot be much diminished by a nice cup of tea" bernard-paul heroux

attach a leader to one of the four radii, pull the dimension off of the part, and include the text below.
4x r.25
the only time a dimension should be on or inside a part is when you don't have any other option.
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]