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DAE see people mixing up true position and concentricity on drawings all the time?
In my experience, I've caught three different junior drafters in the last month calling for concentricity on a simple bore when true position with a diameter symbol is the correct, and way simpler, callout for the machinist to actually work with.
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calebscott1mo ago
Ever wonder why that mix-up keeps happening? Is it just a bad habit taught in some drafting schools, or are the old GD&T charts in the office just that unclear? Like, do they see a round feature and their brain just auto-fills 'concentricity' without thinking about how it's actually measured?
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max9631mo ago
Oh man, I bet it's because concentricity sounds right for circles! But runout or position are usually what they actually need.
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