Digital Caliper Round-Up (:2:) Huge Gap/Design Flaw on the Cheaper Digital Calipers ~Neiko, Carrera
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- Опубліковано 25 сер 2024
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This video is my attempt to visually represent a gap of .001"-,003" on the cheaper digital calipers.
These calipers have this gap and should be avoided:
~Nieko
~Pittsburgh
~Carrera
~Capri
Hold your digital caliper up to the light and look through the internal measuring jaws at a 90 degree angle. If you see light then Zero on your external measuring jaws does NOT equal zero on your internal measuring jaws.
Be sure to watch the first video in the series for the best calipers for the money.
Please purchase a 1" ring gage and do the test again on all calipers, not just the ones you may be trying to sell.
@ 6.12 mark he shows that all calipers have a gap in the I'd jaws when you change your viewing angle. Calipers need this gap so that the I'd jaws can pass by each other. When the calipers are fully closed you cannot take a measurement with the ID jaws. When manufacturers design these instruments they know this. They do not intend on anyone thinking that this is a way to measure inner diameters. All that matters is when you open the calipers to read inner measurements they should read accurately to a known size. Can't do this when they are closed.
I asked this in your other video. Which direction does the battery cover slide off? Always love getting this Chinese crap, with no directions. Even a picture would help. The caliper was free. Now I know why.
Because the inside measuring blades have a small flat on them and they are offset against each other there should be a small gap. But depending on the size of the hole it would need to be variable. Basically digital calipers are not great for accurately measuring hole sizes.
Did many, many test measurements with many calipers. 0 is 0, on these with big gaps 0 is not 0.
I picked up a " Husky " brand at a home depot.
Any thoughts or suggestions are much appreciated.
I assume you know that there is an extra 0.02mm (0.001") allowance on the accuracy spec when measuring with the internal jaws and depth rod?
Ahh, so the inaccuracy on the cheap models is within spec. Funny it doesn't say as much in any of the included literature. The igaging and mitutoyos don't have this problem and the cheaper iGaging is less than $10 more than the Neiko:
www.amazon.com/dp/B001AQEZ2W/?tag=caliper1-20
I'll pay $10 more for an accurate instrument any day
Cre8ersWorld
Gordon Clarke I assume you do know, and have read it, that there is an international standard for manufacturing calipers and that it includes accuracy specifications?
@@Cre8erS To bad you don't understand the fact that you are incorrectly pointing out the lack of inaccuracies. The space is not a measurement, you do NOT need any literature to understand the need for the space so the I.D. jaws can slide past each other. The measurement made with with I.D. jaws is done on (of all things) Inner diameters! Too bad the Company you are trying to sell products for doesn't teach their salespersons this physical property of slide calipers. It has nothing to do with different manufacturers, or the price point of any of their calipers. YOU CANNOT READ -0- ON I.D. JAWS!!!!!
@@dennisallport1471 All measurements on a caliper depend on a a zero point. You can't measure zero on OD either, but zero has to be set and all measurements taken from that point. When you start with a 002" space, which will be added to your measurement, you have already lost. Good calipers don't have this space. It is not there to facilitate the Jaws sliding past each other, that would be on a "Z" axis. The only way to compensate for the space is to re-zero at a point where there is no space.
How to fix this problem
Why not just measure all the caliper inside measuring using ring gauges like you would use to check intra-mikes, I think that would be more of a valid test. using the feeler gauge all you are doing is measuring deflection not actual measuring.
Well, you win the argument over consistency.....you are consistanty handing out misinformation. The space in the ID jaws (when the ID jaws are closed) will be there. Its not a measurement.
What YOU came up with (feeler gage test) proves nothing, sir. Test the accuracy of the ID jaws using what is intended to be used to check internal measurements...either a ring gage with a known size or a step gage. Seeing a space does not measure it!