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<blockquote data-quote="Johnny" data-source="post: 2500818" data-attributes="member: 14057">Yeap. It is not hard to understand. I also explain it some one using shooting an arrow or bullet thru a round hole vs a square hole. Corners of the square intersect the circle. The closer to center you are horizontally the farther you can be off vertically and still not nick the edge of your hole and vise versa. It clicks for some people and some it doesn&#039;t. Right about the time they start to get it I throw Max and min material condiition into it and really screw them up. You can&#039;t make people understand that it really gives you more tolerance. I have seen it miss used on so many ocassions by engineers also. I think some of the big companies send engineers thru GD&amp;T classes then tell them that is how they have to tolerance everything. Then you see drawings with a +/-.010&quot; on hole size with a .001&quot; true position. Somee of the medical companies like Bio Meriux and Smith and Nephews stuff was like that.&nbsp; Lockheade Martin had issues with it to.</blockquote>

[QUOTE="Johnny, post: 2500818, member: 14057"] Yeap. It is not hard to understand. I also explain it some one using shooting an arrow or bullet thru a round hole vs a square hole. Corners of the square intersect the circle. The closer to center you are horizontally the farther you can be off vertically and still not nick the edge of your hole and vise versa. It clicks for some people and some it doesn't. Right about the time they start to get it I throw Max and min material condiition into it and really screw them up. You can't make people understand that it really gives you more tolerance. I have seen it miss used on so many ocassions by engineers also. I think some of the big companies send engineers thru GD&T classes then tell them that is how they have to tolerance everything. Then you see drawings with a +/-.010" on hole size with a .001" true position. Some e of the medical companies like Bio Meriux and Smith and Nephews stuff was like that. Lockheade Martin had issues with it to. [/QUOTE]

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