Printing more or less tight fitting parts.

[iDig3Dprinting]

Thank you. It is not a design flaw because I printed a part with 6.40mm hole in it. When I measured the part with a caliper it is 6.32mm.
The outside diameter of the part turned out to be 47.95mm but in the design it is 48.35. I can compensate by adjusting the scale over x and y in the printing profile?

So the difference in your models may be due to the calibration of your xyz axis being out slightly. The printer is moving the steppers X number of steps per mm but the value of X may be too low, it has to move more steps to make up a mm.

try printing out a calibration cube to check and re-define your printers steps per mm. The instructions on the calibration calculations are also on the page.