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GD&T flatness tolerance

GD&T flatness tolerance

GD&T flatness tolerance

(OP)
Hi,

Can anyone tell me how will you designate flatness tolerance for multiple surfaces on the same datum plane as per ASME Y14.5 std.

PS: I have several surface projections on the same plane but I need to specify a flatness tolerance for that entire surfaces using a single tolerance value. For ex: Profile tolerance symbol & .010 value for X number of surfaces.

Thanks,

RE: GD&T flatness tolerance

Drafting Standards, GD&T & Tolerance Analysis May be a better place to ask, also a picture paints a thousand words so you may want to attach a sketch and specificy which version of 14.5M-1994 you're using.

However, if using -1994 standard I'd take a look at the section on coplanarity 6.5.6 & associated figures 6-20 & 6-21. If it really is being used as a datum plane look at 4.5.7 as well & figure 4-20.

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