So if the CMM room temp. changes from 70-80 degrees, would that mean that 15.000" dia would actually grow up to .001" ??? Yet the result would still be 15.000 ????
Well if your part and your gage are made of exactly the same material, at exactly the same thickness, receiving the exact same deviations in temperature, maybe.
Otherwise, any measurement that gets taken from the expanding diameter will be different. It's
typically minuscule, but if you work in tight tolerances you might want to do some studies/tests.
For example, our tolerance on an OD could be 50 millionths of an inch, so expansion of .001" is kind of a big deal
Well if your part and your gage are made of exactly the same material, at exactly the same thickness, receiving the exact same deviations in temperature, maybe.
Otherwise, any measurement that gets taken from the expanding diameter will be different. It's
typically minuscule, but if you work in tight tolerances you might want to do some studies/tests.
For example, our tolerance on an OD could be 50 millionths of an inch, so expansion of .001" is kind of a big deal
