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GD&T of CFR

GD&T of CFR

GD&T of CFR

(OP)
I tried posting earlier but I don't think it went through. Sorry if this double posted.

I am trying to tolerance a drawing for carbon fiber calibration targets. The material is very textured, think small diamond plate. If I put a flatness tolerance of .0002" on it will all the parts fail because the roughness is greater than .0002"? This is a general drawing that should cover the part if there is a texturing to it or not. Is the roughness and flatness completely independent?

RE: GD&T of CFR

Roughness is something of a refinement /subordinate of flatness.  So, if roughness exceeds the flatness tol, then it would fail.

Jim Sykes, P.Eng, GDTP-S
Profile Services  www.profileservices.ca
TecEase, Inc.  www.tec-ease.com

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