Flatness Call out
Flatness Call out
(OP)
I am working with a vendor who wants to spec out the folowing :
1,5 mm/2 m Flatness
1,5 mm/2 m Straightness
I think calling out flatness and striaghtness this way is wrong . any ideas?
-mechantaeus
1,5 mm/2 m Flatness
1,5 mm/2 m Straightness
I think calling out flatness and striaghtness this way is wrong . any ideas?
-mechantaeus
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RE: Flatness Call out
RE: Flatness Call out
But use "-", not "/". Can be mis-read.
Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP0.1 / PDMWorks 05
ctopher's home site
RE: Flatness Call out
RE: Flatness Call out
If these two specifications are being applied to the same surface, there is no need to have both. Since they are both of the same value, the straightness specification (2D tolerance) will already be controlled as part of the flatness specification (3D tolerance). The straightness specification would only only be useful if it refined the straightness to something better than 1,5mm/2m.
GDTGUY
RE: Flatness Call out
Thanks for another clear explanation! It deserves a star.
RE: Flatness Call out
Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP0.1 / PDMWorks 05
ctopher's home site
RE: Flatness Call out
Y14.5 is only applicable if stated on the drawing. GD&T has been used on drawings before there even was a Y14.5 standard. That is why it is important that the standard and year of release be noted.
RE: Flatness Call out
Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP0.1 / PDMWorks 05
ctopher's home site
RE: Flatness Call out
RE: Flatness Call out
-mechantaeus