Answer / suresh

Concentricity will use to give geometric tolerance between
two perfect cylindrical surfaces which is coming adjacent to
each other .
but coaxiality will use to give geometrical tolerance
between axis of two holes or cylindrical surfaces which is
not adjacent to each other. which is in different planes
parallel to each other.

Answer / fisher

Please read ASME Y14.5M-1994 Page 146

5.12.2 Difference Between Coaxiality Controls
and Concentricity.

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