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unilateral GD&T

unilateral GD&T

unilateral GD&T

(OP)
Is solidworks capable of putting in unilateral GD&T callout on a drawing. I cant find it?

Thanks,

jeff

RE: unilateral GD&T

I believe you will have to use Bilateral +.005 / -.000

RE: unilateral GD&T

(OP)
Its for profiling a line.

RE: unilateral GD&T

OK, I'm stumped.  What's "unilateral GD&T"?  I thought GD&T callouts were unilateral unless otherwise specified.

RE: unilateral GD&T

Why not dim to curves or points, then use the Profile symbol with tol?

Chris
Systems Analyst, I.S.
SolidWorks 06 4.1/PDMWorks 06
AutoCAD 06
ctopher's home (updated 06-21-05)

RE: unilateral GD&T

You will have to do a workaround.  I usually offset the entites and then add a dimension and remove the text to show the direction of the tolerance.

SolidWorks 2006 - SP3.0
UG NX3
Pro/Engineer Wildfire 2.0

RE: unilateral GD&T

SolidWorks 2007plus or SolidWorks 2008

RE: unilateral GD&T

(OP)
Thanks for the info. Hope SW adds that feature.

RE: unilateral GD&T

IAW ASME 14.41-2003 DIGITAL PRODUCT DEFINITION DATA PRACTICES, a unilateral profile tolerance no longer requires a curve to define its extent and is called out as follows:

profile symbol | tolerance; outward symbol ("U" in a circle); tolerance applied outward |datum(s)

If the tolerance is inward, the "tolerance applied outward" is negative.

Apparently it was not enough of a change to update ASME Y14.5, so it was included in 14.41.  Of course, most of us are governed by Y14.5 at this time, but there are other options out there.

RE: unilateral GD&T

If you're trying to do something like apply a tolerance on a bore size wherein you want, say, +.0002 minimum oversize to +.0008 maximum oversize, then just place a plus (+) sign in front of the MINUS tolerance value.  It ends up showing correctly in the drawing with both max and min tolerance showing a plus prefix.

Mark Stapleton
Watermark Design, LLC
Charlotte, NC
www.h2omarkdesign.com

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