Timeline for How can I tell the size of a barrel power connector?
Current License: CC BY-SA 3.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 4, 2015 at 9:01 | comment | added | BrainSlugs83 | Not helpful -- yes you can measure the hole, but how do you measure the PIN!? -- you can't get either set of jaws in there to clamp on the pin to measure it. | |
| Jan 1, 2015 at 4:59 | comment | added | Chris Stratton | Actually, the jack has the pin, it's the plug which has the socket. So if trying to purchase a supply for a device, it's an OD measurement which is being made (the overall barrel diameter is larger, so making that ID measurement is more practical) | |
| Sep 13, 2014 at 15:22 | comment | added | Joe | A caliper will tell the inside diameter close enough to determine pin size of a barrel jack. You rotate the caliper while pulling it apart until it stop growing. | |
| May 5, 2014 at 1:01 | comment | added | MickeyfAgain_BeforeExitOfSO | Sorry, but this is Just Plain Wrong. A caliper will correctly measure the inside distance between two flat surfaces but will not correctly measure the inside diameter of a round hole. It will always give an undersized measurement. As suggested in other answers, PIN gauges, or faking a PIN gauge with drill bits, will give a much closer answer. If your hole is large enough you can use a "small hole gauge" (look that up too when you look up vernier) in conjunction with you caliper or micrometer, but you cannot expect a direct caliper measurement to be correct. | |
| Dec 4, 2013 at 0:02 | comment | added | Pete Kirkham | I hate it when people call digital callipers vernier callipers. | |
| Jul 19, 2013 at 1:48 | comment | added | Kaz | Bingo. And my most recent use of one of these was ... measuring the inside diameter of an oddly sized DC barrel jack! | |
| Mar 3, 2013 at 5:02 | comment | added | HikeOnPast | I'd recommend using the internal jaws to estimate the o.d. of the pin. helloworld922 is spot on - there are only a few pin sizes per barrel o.d., so if you can estimate by eyeballing with your caliper, you can almost always pick the right one. | |
| Mar 3, 2013 at 4:44 | comment | added | dwwilson66 | LOVE the animated caliper... :) I've got one that measures us to 2.5", but the jaws are still too beefy to get inside the hole to measure pin diameter. There's about 3-4mm before the pin is accessible; the slope of the jaws just don't do it. In most cases, the hole is easy with the internal jaws...the pin seems to be a bigger issue. Maybe I'll get a cheap Chinese caliper on eBay and spend an afternoon Dremel-ing the jaws... :) | |
| Mar 3, 2013 at 4:30 | history | answered | HikeOnPast | CC BY-SA 3.0 |