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Spare Parts to keep on hand? |
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Rebel92 
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Joined: Jul 20 2021 Location: Hattiesburg, MS Status: Offline Points: 541 |
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 Posted: Oct 13 2021 at 4:37pm |
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6 in. Composite Digital Caliper (harborfreight.com)
is this the el-cheapo you had in mind? anything that price has me curious.
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Matt_X
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Joined: Nov 10 2020 Location: Phila, Penn Status: Offline Points: 705 |
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Posted: Oct 13 2021 at 5:18pm |
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That is cheap! I use a vernier caliper.  I think dad bought from Sears in the 70's.Never looses calibration if treated right and no batteries to go bad etc. All it needs is a good eye, or these days for me that means a magnifier or at least reading glasses. LOL I'd be Ok with a cheapy like that if I had something of known thickness to compare with ever so often. |
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Rebel92
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Joined: Jul 20 2021 Location: Hattiesburg, MS Status: Offline Points: 541 |
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Posted: Oct 13 2021 at 5:24pm |
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unless someone (Floyd, you, or anyone else) shows me a better alternative, I will probably end up buying a somewhat nice one instead of buying a POS and having to buy another one to check it with.
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Matt_X
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Joined: Nov 10 2020 Location: Phila, Penn Status: Offline Points: 705 |
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Posted: Oct 13 2021 at 5:37pm |
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Oh I didn't mean another caliper, I meant something that could act as a gage block. Or if you have a friend nearby who has a gage block. I can't think of anything common off the top of my head but maybe someone will. Also I may be more picky than others.
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floydthecat
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Joined: Oct 13 2016 Location: Mississippi Status: Offline Points: 1902 |
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Posted: Oct 13 2021 at 5:45pm |
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Certainly nothing wrong with buying a better quality tool. There is a tolerance to about anything. A couple thousandths off one way or another is not going to matter in this case. These are what I use for everything, even reloading. If all you plan to use it for is checking head space on occasion, these are fine. Now, if I were a gunsmith or machinist I’d probably toss them in the trashcan. You can read where guys have measured their head space gauges and find them off by a tad vs. the published dimensions. The craftsmanship of the gauge and tolerance of the measuring tool are at work. Then you have human error. When you get down to measuring in terms of ten thousandths or even thousands, how tight to fit the instrument can vary and any two times you measure the same thing may be different.
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W5USMC
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Joined: Apr 29 2017 Location: Missouri Status: Offline Points: 2815 |
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Posted: Oct 13 2021 at 7:22pm |
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I've got a Hornady branded caliper that I think I paid close to $40 for, it is made in China, it works fine but is probably made in the same place that the Harbor Freight caliper was.
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Wayne
USMC Retired NRA Life Member |
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Matt_X
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Joined: Nov 10 2020 Location: Phila, Penn Status: Offline Points: 705 |
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Posted: Oct 16 2021 at 4:32pm |
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OK. I don't know where my brain was the other day. If you ever changed your own spark plugs then you have some sort of half decent feeler gages. When dealing with a caliper or micrometer of uncertain calibration. a) clean the jaws with a piece of paper. b) check the zero measurement. c) check the measurement against a feeler gage. I don't know what the tolerances are with a digital caliper but my guess is any offset will be either the same or linear. In other works if it reads .001" closed (zero), then it will probably read .036" on a .035" feeler gage.
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Smokpole
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Joined: Oct 21 2019 Location: Madison ohio Status: Offline Points: 960 |
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Posted: Oct 17 2021 at 7:11am |
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I prefer dial calipers. They are easy to check the zero on and adjust when needed. Plus they are easier to read with a good sized dial.
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OGCA Life member
NRA Life member Ashtabula Rod and Gun Life member |
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floydthecat
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Joined: Oct 13 2016 Location: Mississippi Status: Offline Points: 1902 |
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Posted: Oct 17 2021 at 8:18am |
Just out of curiosity I grabbed a handful of feeler gauges to check my cheap Harbor Freight $10 digital calipers. Spot-on with the feelers. Couple of times a gauge would read off by .0005 (.0235 vs .024 feeler), but most of the time the reading matched the gauge. WAY better than government work.
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floydthecat
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Joined: Oct 13 2016 Location: Mississippi Status: Offline Points: 1902 |
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Posted: Oct 17 2021 at 11:15am |
Nope….mine are stainless steel and in a hard case. I don’t know if I would trust those plastic ones either? Maybe I gave a little more than $10, but it was not much more. My wife gives me $20 and takes my wallet and credit cards before she allows me to go shopping.
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Matt_X wrote: