so we're going to put this back on here and what number do you see on the barrel 66 okay so all right down is the 100 6 inches 00 6 inches so now all we do is we just add these up so we have 6 57 so that particular measurement or that particular spot on that piece is point seven five six inches or seven hundred and fifty six thousandths of an inch okay that is how you're going to measure something okay now i feel that a square or flat object is pretty easy to measure but we build upon occasion run into a round object okay these can take a little bit more finesse i guess you could say a little bit more getting used to how to use this measuring round object what you want to do is basically the same thing you want to open up the micrometer large enough to fit over the shaft and you want to snug it down on there now because because we have a round object I could get the micron or exaggerating over here or over here I want to be right in the middle okay so that's why I say they round object may take a little bit of getting used to the measure but would practice I think you can measure accurately does everybody understand how to add up the numbers must we get them from the micrometer okay all right like I said if we don't keep the decimal places correct for instance on the point zero five zero if I would have wrought it something like this our old dimension was 0 point seven five six inches right if I would add this up i end up with 60 to 1 that's a big difference to half inch difference okay it's very important I don't know if any of you have worked on turban jobs or jobs we have to do these precision measurements a half inch is a big deal okay so it's very important that we take our accurate readings now like I said with this box my commerce go from 0 to 1 1 2 2 2 2 3 3 and 4 4 5 5 to six so we can measure 6 inches what do we do if we have something larger well they do make larger microns this particular my Connor it's not going to be as easy to hold what your pinky so you may need to get assistance with larger micrometer it's like something like this this one I can actually measure from nine inches to 12 inches with this mic on the way we do that is the end of this unscrews and we put different measuring surfaces and again we have to verify the calibration on these before we take the measurements and with this set there does there comes standards with them you're going to use them with the exact same way as you did the other instrument of the other standards putting other my commoners but like I said you may need assistance especially if you haven't used by commoners like this before when you do replace these measuring surfaces you want to make sure that this is snug again you don't need to put players on here but let make sure that it is snug in this title now what we need to do we took our measurements we're all doubled our my power at the end of the day so we want to do is we want to take this and spin it all the way in and it's a good idea not to run it all the way tight the reason why that is is because it is possible that if you run a tight moist ER to get in there and it could cost the measuring services if that happens then you're going to have an accurate my property you can't send it back to the factory so I'm leaving maybe like a 30 second of a cap and there's a lock on there this spring right here is a lot so we can lock that down so it won't spin if this is traveling around in a game box or in your car something like that I recommend that you put the locks on that way it's not going to spin clothes and get busted why do we want to do do we have any questions okay I got some questions for you just as a little review on what we've gone over why why should we clean up my counter when we take it out of the box it's your everybody okay why we check in calibration to make sure there's a measurement with the micrometer you're using right we don't know we can measure something but unless we verify the calibration we don't know if indeed its measured correctly okay so that's the reason for calibration why is it important that we use a proper tension of our measuring a particular object right sometimes we're measuring soft surfaces brass babble material things like that they're very soft perhaps even let so we want to use caution we don't want over we don't want to open this up either like I said it's possible we could tighten this up and flex that open and we don't want to do that either why is it important that we write down and keep our decimal places in the right columns what happens if we don't do that right as i showed you just moving a decimal place 11 column change art our dimension a half inch okay you can't have that on a job now what do we want to do when we return it back of the case Clea clean it and we may want to put the lock on air so it doesn't spin close right okay now we'll go on the shop and we'll take measurements