Measurement error in checking parts?

Question

Say you need to check part thickness in a brake rotor. You will have to check 40-50 of these rotors. If I was already using a 0-6" micrometer and swtiched to a 0-1" micrometer, do you think that the measurement accuracy would increase. Keep in mind these rotors are about .8" thick.

Can you guys think of anything that could go wrong using a 0-6" micrometer to measure a part that is only .8 inches thick?

Would the measurement variation be better using a smaller range micrometer?

minefinder · Accepted Answer

All other things being equal, there will be no difference in the precision or accuracy between a 6" and 1" micrometer.

Anonymous · Answer

Most micrometers measure to the thousandth of an inch, and that doesn't change whether it's a 0-1" or 0-6" micrometer.  So the accuracy of either tool should be the same.  However, if you're going to be measuring a large quantity of parts, some other things should be taken into consideration: namely, the time it takes to measure.  Digital calipers will help you measure more quickly, or, depending on the reason you're measuring, a go/no-go gauge often will suffice.  This helps you tell whether a part is in tolerance, but won't give you the exact measurement.

http://en.wikipedia.org/wiki/Go-NoGo_gauge#Snap_gauge

ballweg · Answer

First step in layout is to easily be sure you have got here up of answer that remedy the subject and be sure that the venture you designed are greater healthful for purpose, when you build different components of the object , you ought to be sure that the size are precisely as designed, or you will finally end up trial and mistake that's intense priced and time eating

Measurement error in checking parts?

3 Answers