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 )
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!
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.
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.
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?
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.
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: th-cam.com/video/qLzMQtJAljg/w-d-xo.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.
Great video for technique, but it is so funny to listen to Americans struggle with "3 and a half 10 thousandths minus half one one hundredth plus half a little line". It's like asking my wife to use a tape measure. Surrender to metric!!
as an american who's lived in europe, i truly dont understand why we still do it to ourselves. daylight savings time is a close second in terms of unnecessarily tormenting ourselves.
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 had been looking for a video to learn this device until ı found you, thank you so much
You explain things well, thank you.
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 )
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.
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
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.
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.
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?
Thanks for the video, it was very helpful!
Very nice to see
very informative. thank you!
so main use of bore gauge is mesure that vernier and micrometer screw cant get near to the object.
Thanks for the great video
justin miller well explaination
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.
Very useful vedio to educate the students
Thank you for the video. It's always new for someone
Wonderful video it's helpful to me bro thankyou very much bro ....
Bro
thank u so much sir
I didn't know it was that easy
nice video
This is so much easier with a digital dial indicator
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.
Nice video boorgeze setting you
Nice
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.
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.
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: th-cam.com/video/qLzMQtJAljg/w-d-xo.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
Great video for technique, but it is so funny to listen to Americans struggle with "3 and a half 10 thousandths minus half one one hundredth plus half a little line". It's like asking my wife to use a tape measure. Surrender to metric!!
as an american who's lived in europe, i truly dont understand why we still do it to ourselves. daylight savings time is a close second in terms of unnecessarily tormenting ourselves.
Sean Barmettler Lol true so true
It would be the same with metric
I’d prefer metic English is a pain sometimes
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.