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Re: Is this GD&T callout illegal?
Re: Is this GD&T callout illegal? -- Doug Bailey Post Reply Top of thread Forum
Posted by: Cragyon

04/14/2003, 12:57:36

Doug,Depending on the particular holes being specified within the feature control frame, referencing a hole pattern is not incorrect. Often, one will see this application when functional check tools (GO NO-GO) gages are used.: I have seen this callout on many drawings and it has always struck me as being odd. Its a true position callout with only ONE datum reference that refers to a 3 hole pattern. The 3 hole pattern itself is the B datum.: |O|0.5(M)|A| 3 holes: where O is true position symbol and A is the datum plane. Is this callout missing something, or is it : trying to convey something OTHER then a true position.: Is this just a mistake on the designers part?: Please help.:

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-----Re: Re: Is this GD&T callout illegal? Doug Bailey 0 394 bytes 04/14/2003, 13:29:32

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