Good Day Justin : I'm a aircraft level inspector . I really enjoyed the video . I went through College for Tool & Die Design . Your video certainly brings back memories . I spent about 16 yrs in a military gas turbine blade mfg plant and also other aircraft level Shops in Canada . I used hundreds and hundreds of dial bores like Starrett, Mitutoyo , Federal , Sunnen etc . When you are attempting to locate an out of round condition always use a straight rod dial bore , as in your video. Get your purchasing dept to locate a setting device for you that will accommodate the dial bore that is shown in your video . ( looks like a Mitutoyo ) . If you are measuring a completely finished over bored cylinder , use a a digital Sunnen three fingered dial bore for your needs . This type of dial bore contacts at three spots 120 degrees apart and will give you excellent /splendid results on your new finished bores . The beauty of the three fingered models is that they automatically set them selves . Each comes with an accurate "Setting Ring" , no chance for error , ever . Good Luck !
instead of using micrometer we can use master ring of that particular size and we r always supposed to set the bore dial gauge zero ( with respect to particular master ring ) before inserting it in any hole for measurement. Now reading clockwise is plus size and anticlockwise is minus size ( from set zero )
As long as it's a very good, accurate micrometer. If you have cylindrical ring gage (setting ring inside diameter), it's the easiest and most accurate way to calibrate dial bore gauge. Of course, you may not have one in your inventory and have to special order it.
This technique will give one a measurement of the bore size however, it introduces error in that it can't tell you if the bore is egg or barrel shaped because it is measuring at two points. I always use three position measuring micrometers which reduce those errors.
You are right about measuring taper and out-of-round. That can be done easily with this tool, by taking at least three measurements around the cylinder at both the upper and lower ends of the cylinder.
Personally I rather use telescopic gauges in combination with a set of micrometers. Easier to use and you can measure a dimension instead of check a dimension. But it's all personal preference of course. Nice vid!
I like it! Wouldn't you have to twist it also to insure that it's at the widest point? Kinda like how your rocking it to insure it's at its widest point in the vertical plane so wouldn't you need to twist it on the horizontal circumference plane? Does that make sense?
No, this tool can't be used in that way. If you rotate the tool, you must then pivot it up and down again to find the measurement in that location. If you want to get more accurate to make sure you aren't missing the widest spot, you will just have to measure the bore in more positions around the cylinder.
hi Justin, very good video! One remark. At minute 2:00 you set the gauge to zero using the micrometer. The long hand of the dial gauge is dialed to zero. The short hand of the gauge indicating 10 thousandth or full turns shows there something between two and three, about 2.7. At minute 2:52 at the first measurement of the cylinder the short hand of the dial gauge shows about 1.3. So the difference to zero is somewhere between 10 and 20 thousands. And more precise (reading now also the long hand of the gauge) it is about 13.6 thousands above specification? What do you think?
You'd want to look at an inside bore mic. They have a cylindrical ceramic style that you can get which is a great reference tool. And then you'd need to pair that with an appropriate micrometer to check the size.
We used these today for the first time. I noticed that it was confusing on how to get a reading. If you tilt the tool then the gauge just moves all over the place. Is the point to keep it upright, and then get the reading?
Yes, setting up the bore gauge in the micrometer can be tricky. I find that it is easiest to hold the back of the gauge steady while rocking the front end up and down. It is still sometimes takes a few minutes to get a good adjustment.
You could Bob, but it would depend on your tolerance. A caliper is only accurate upto +/- 0.002" which gives a 0.004" range of error. With a cylinder bore you'll want to be as accurate as possible, so using a micrometer which repeats within 0.00005" would be best practice. If you're cylinder bore tolerance was +/- 0.005" a Digital Caliper would be perfectly fine.
You could, but it would depend on your tolerance. A caliper is only accurate upto +/- 0.002" which gives a 0.004" range of error. With a cylinder bore you'll want to be as accurate as possible, so using a micrometer which repeats within 0.00005" would be best practice. If you're cylinder bore tolerance was +/- 0.005" a Digital Caliper would be perfectly fine.
+Alexandro Ochoa A premium brand micrometer is Mitutoyo. However, I usually choose Fowler brand measuring tools because they are reasonably priced and still have high quality.
The tool is actually quite accurate, but that silly tube that I am using is very uneven on the inside. You will get more consistent readings on a real engine cylinder or sleeve. Try this video instead: ua-cam.com/video/qLzMQtJAljg/v-deo.html.
by moving it around, value changes, but when measuring bore, you move it and look for maximum. Diameter is by definition bigggest straight line inside a circle. And that is what we want to measure
@@jevnik542 you move it in axial direction, so you actually look for the smallest dimension. That determines the diameter. This tool is spring loaded and centers itself in the centerline of the diameter.
You could Bob, but it would depend on your tolerance. A caliper is only accurate upto +/- 0.002" which gives a 0.004" range of error. With a cylinder bore you'll want to be as accurate as possible, so using a micrometer which repeats within 0.00005" would be best practice. If you're cylinder bore tolerance was +/- 0.005" a Digital Caliper would be perfectly fine.
Good Day Justin : I'm a aircraft level inspector . I really enjoyed the video . I went through College for Tool & Die Design . Your video certainly brings back memories . I spent about 16 yrs in a military gas turbine blade mfg plant and also other aircraft level Shops in Canada . I used hundreds and hundreds of dial bores like Starrett, Mitutoyo , Federal , Sunnen etc . When you are attempting to locate an out of round condition always use a straight rod dial bore , as in your video. Get your purchasing dept to locate a setting device for you that will accommodate the dial bore that is shown in your video . ( looks like a Mitutoyo ) . If you are measuring a completely finished over bored cylinder , use a a digital Sunnen three fingered dial bore for your needs . This type of dial bore contacts at three spots 120 degrees apart and will give you excellent /splendid results on your new finished bores . The beauty of the three fingered models is that they automatically set them selves . Each comes with an accurate "Setting Ring" , no chance for error , ever . Good Luck !
Thank you! Simple and awesome explanation. Great refresher on dial bore gauges
instead of using micrometer we can use master ring of that particular size and we r always supposed to set the bore dial gauge zero ( with respect to particular master ring ) before inserting it in any hole for measurement.
Now reading clockwise is plus size and anticlockwise is minus size ( from set zero )
You explain things well, thank you.
I had been looking for a video to learn this device until ı found you, thank you so much
Thanks. I just bought a set of guages and the instructions that came with it might as well have been written in Russian.
😂😂😂😂😂
Great video demonstration of the use of a bore gage.
As long as it's a very good, accurate micrometer.
If you have cylindrical ring gage (setting ring inside diameter), it's the easiest and most accurate way to calibrate dial bore gauge. Of course, you may not have one in your inventory and have to special order it.
This technique will give one a measurement of the bore size however, it introduces error in that it can't tell you if the bore is egg or barrel shaped because it is measuring at two points. I always use three position measuring micrometers which reduce those errors.
You are right about measuring taper and out-of-round. That can be done easily with this tool, by taking at least three measurements around the cylinder at both the upper and lower ends of the cylinder.
Thanks for posting this.
Personally I rather use telescopic gauges in combination with a set of micrometers. Easier to use and you can measure a dimension instead of check a dimension. But it's all personal preference of course. Nice vid!
Thanks for the tip - ordered! :)
Learned a lot thanks
Thanks for the video, it was very helpful!
I like it! Wouldn't you have to twist it also to insure that it's at the widest point? Kinda like how your rocking it to insure it's at its widest point in the vertical plane so wouldn't you need to twist it on the horizontal circumference plane? Does that make sense?
No, this tool can't be used in that way. If you rotate the tool, you must then pivot it up and down again to find the measurement in that location. If you want to get more accurate to make sure you aren't missing the widest spot, you will just have to measure the bore in more positions around the cylinder.
justin miller well explaination
so main use of bore gauge is mesure that vernier and micrometer screw cant get near to the object.
Thanks for the great video
Very nice to see
hi Justin, very good video! One remark.
At minute 2:00 you set the gauge to zero using the micrometer.
The long hand of the dial gauge is dialed to zero.
The short hand of the gauge indicating 10 thousandth or full turns
shows there something between two and three, about 2.7.
At minute 2:52 at the first measurement of the cylinder the
short hand of the dial gauge shows about 1.3.
So the difference to zero is somewhere between 10 and 20 thousands.
And more precise (reading now also the long hand of the gauge)
it is about 13.6 thousands above specification?
What do you think?
This is so much easier with a digital dial indicator
very informative. thank you!
Thank you for the video. It's always new for someone
Very useful vedio to educate the students
Wonderful video it's helpful to me bro thankyou very much bro ....
Bro
I didn't know it was that easy
Great video, I looked for nearly that. Can you help with what we should use if we need measure 2 meters (6,5 ft I suppose) in diametr cylinder.
You'd want to look at an inside bore mic. They have a cylindrical ceramic style that you can get which is a great reference tool. And then you'd need to pair that with an appropriate micrometer to check the size.
thank u so much sir
nice video
Nice video boorgeze setting you
Nice
thanks
We used these today for the first time. I noticed that it was confusing on how to get a reading. If you tilt the tool then the gauge just moves all over the place. Is the point to keep it upright, and then get the reading?
Yes, setting up the bore gauge in the micrometer can be tricky. I find that it is easiest to hold the back of the gauge steady while rocking the front end up and down. It is still sometimes takes a few minutes to get a good adjustment.
can you use a digital vernier caliper to calibrate this as well? Like, turn the knob to lock it and use that?
You could Bob, but it would depend on your tolerance. A caliper is only accurate upto +/- 0.002" which gives a 0.004" range of error. With a cylinder bore you'll want to be as accurate as possible, so using a micrometer which repeats within 0.00005" would be best practice.
If you're cylinder bore tolerance was +/- 0.005" a Digital Caliper would be perfectly fine.
i was wondering do you have to have a mikrometer to set to dial bore gauge to zero or can i use a digital caliper???
You could, but it would depend on your tolerance. A caliper is only accurate upto +/- 0.002" which gives a 0.004" range of error. With a cylinder bore you'll want to be as accurate as possible, so using a micrometer which repeats within 0.00005" would be best practice.
If you're cylinder bore tolerance was +/- 0.005" a Digital Caliper would be perfectly fine.
What brand of micrometers is that? Would you recommend it to merasure crank journals?
+Alexandro Ochoa
A premium brand micrometer is Mitutoyo. However, I usually choose Fowler brand measuring tools because they are reasonably priced and still have high quality.
Thank YOu !
For being a machining tool this doesn't seem to be very accurate at all. You can literally make it read whatever you want it to by moving it around
The tool is actually quite accurate, but that silly tube that I am using is very uneven on the inside. You will get more consistent readings on a real engine cylinder or sleeve. Try this video instead: ua-cam.com/video/qLzMQtJAljg/v-deo.html.
by moving it around, value changes, but when measuring bore, you move it and look for maximum. Diameter is by definition bigggest straight line inside a circle. And that is what we want to measure
@@jevnik542 you move it in axial direction, so you actually look for the smallest dimension. That determines the diameter. This tool is spring loaded and centers itself in the centerline of the diameter.
@@teis79 with a digital dial indicator it is much easier to read
Nice
thanks
can you use a digital vernier caliper to calibrate this as well? Like, turn the knob to lock it and use that?
You could Bob, but it would depend on your tolerance. A caliper is only accurate upto +/- 0.002" which gives a 0.004" range of error. With a cylinder bore you'll want to be as accurate as possible, so using a micrometer which repeats within 0.00005" would be best practice.
If you're cylinder bore tolerance was +/- 0.005" a Digital Caliper would be perfectly fine.