Do they sell a gauge to measure Coaxial Power Connectors?

Sort of. I either use one of a set of matching sockets or small lengths of fine tubing. Sockets are easier to measure using fine twist drills which are typically sold in sets...

Mike.

outer dia: micrometer, drill bits, nails inner dia: drill bits, small nails/pins,

NT

None that I've found. The parts that are hard to measure, I generally just give up and buy a few score of each nearby size. At a PPOE, we kept notes on 'hits' when an important failure-prone connector matched something we could order (didn't happen a lot).

If it were time-critical (and I couldn't find a junker adapter to clip a pigtail from), I've got drill bit shanks down to #60 (~1mm), and modeling clay, and a measuring microscope. The thing is, even if I DID measure accurately, the 'nominal' sizes of commercially available mates would still be a mystery. So, it's easier to keep a divider-box of a dozen sizes of the males/females, with annotation as to what to reorder.

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.... Phil

but are very inaccurate when measuring small diameter internal holes such as barrel connectors. Try it & you'll see why.

NT

Those are nice. In addition to the standard vernier calipers, I have the dial type. So much easier to read. They are also available now with LCD displays.

I use a dial caliper. I've never had any problems.

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Which had been posted here already....

.... Phil

I don't know how you'd measure after it went through a crimp-tool.

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I've always called them "DC plugs" so folk know what I am talking about.

.... Phil

Sharp calipers are okay for both.

Cheers

Phil Hobbs

Measure the OD with vernier, dial, or digital calipers.

For the ID, find a matching plug, and measure the OD of the mating center pin. That's also the ID of the receptacle. If the receptacle has a center pin, just measure its OD with the calipers.

Round off your measurements to agree with a list of typical connector sizes. If your measurements do not match anything in the tables, you did something wrong. Try again.

Drivel: I have to deal with a rediculous variety of laptop charger connectors: Standards are a good thing. Every company should have some.

They make gauges, but you don't want to know how much they cost.

The hobby stores sell short lengths of brass tubing that are sized to nest. Buy a foot-long section of each of the smaller sizes. They make excellent gauges for measuring plugs/sockets. IN a pinch, two brass sections and some epoxy will make any size plug you want.

calipers are good if the points are relatively sharp and they line up, neither was the case for the device linked to, nor is for most other cheapie vernier calipers.

NT

Sorry to hear you can't tell the difference between crap tools and ones that work. Or that you can't even get good tools to work.

sorry to hear you like to be childish

Sorry, I don't believe being accurate is childish.

I have a couple of Mitutoyo ones that work great and weren't expensive. Chinese ones are good for scribing circles on copper or aluminum and other such jobs that might hurt the good Japanese ones. ;)

Cheers

Phil Hobbs

My vernier calipers are Mitutoyo. My Dial calipers are Starret.

I have a couple of the absolutey cheap plastic ones. Those are for telling the difference between English and Metric hardware in the "oh boy" bucket.