A) What is the difference between datum, datum simulator and datum feature? Illustrate by example. B)....

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Mechanical Engineering

 
 
A) What is the difference between datum, datum simulator and datum feature? Illustrate by example.
B). Why is surface & plane and line & axis specifically mentioned as datums? Are they not same?
 
C) When is there a need to use datum targets?
 
D) What are the different types of datum targets? 6
 

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4.3 Ratings (512 Votes)
A A datum is theoretical exact plane axis or point locationthat GDT or dimensional tolerances are referenced to AllGDT symbols except for the form tolerances straightnessflatness circularity and cylindricity can use datums to helpspecify what geometrical control is needed on the partA    See Answer
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