Do they sell a gauge to measure Coaxial Power Connectors?

[olds...@tubes.com]

Do they sell a gauge to measure Coaxial Power Connectors?
AKA "barrel connectors".

I can get close using a ruler on the outer part of the plug, but those
pins inside are near impossible to measure.

There are so many variations of them too.

Someone must have some sort of gauge to measure them....

[Mike Coon]

In article <ik229dl060m7ifsdp...@4ax.com>,
olds...@tubes.com says...

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.

[tabb...@gmail.com]

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


NT

[whit3rd]

On Friday, February 23, 2018 at 10:52:49 PM UTC-8, olds...@tubes.com wrote:
> Do they sell a gauge to measure Coaxial Power Connectors?
> AKA "barrel connectors".

> Someone must have some sort of gauge to measure them....

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.

[Phil Allison]

olds...@tubes.com wrote:

------------------------

** These measure ODs and IDs.

https://www.aliexpress.com/item/8-0-200mm-0-02-0-001in-Vernier-caliper-paquimetro-stainless-steel-micrometer-beamcallipers-gauge-measuring/32233906118.html



.... Phil

[tabb...@gmail.com]

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


NT

[Fox's Mercantile]

On 2/24/18 5:03 PM, Phil Allison wrote:
> ** These measure ODs and IDs.
>
> https://www.aliexpress.com/item/8-0-200mm-0-02-0-001in-Vernier-caliper-paquimetro-stainless-steel-micrometer-beamcallipers-gauge-measuring/32233906118.html
>
>
>
> .... Phil

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 am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com

[Fox's Mercantile]

On 2/25/18 3:13 AM, tabb...@gmail.com wrote:
> but are very inaccurate when measuring small diameter internal
> holes such as barrel connectors. Try it & you'll see why.

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

[Phil Allison]

Nick Cat wrote:

----------------
>
> > > Do they sell a gauge to measure Coaxial Power Connectors?
> > > AKA "barrel connectors".
> > >
> > > I can get close using a ruler on the outer part of the plug, but those
> > > pins inside are near impossible to measure.
> > >
> > > There are so many variations of them too.
> > >
> > > Someone must have some sort of gauge to measure them....
> >
> >
> > ** These measure ODs and IDs.
> >
> > https://www.aliexpress.com/item/8-0-200mm-0-02-0-001in-Vernier-caliper-paquimetro-stainless-steel-micrometer-beamcallipers-gauge-measuring/32233906118.html
>
> but are very inaccurate when measuring small diameter internal holes
> such as barrel connectors. Try it & you'll see why.
>

** For accuracy, I use small & PCB drills as feeler gauges.

Which had been posted here already....




.... Phil

[bruce2...@gmail.com]

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

[Phil Allison]

bruce2...@gmail.com wrote:

----------------------------

> olds...@tubes.com wrote:
> > Do they sell a gauge to measure Coaxial Power Connectors?
> > AKA "barrel connectors".
> >
> > I can get close using a ruler on the outer part of the plug, but those
> > pins inside are near impossible to measure.
> >
> > There are so many variations of them too.
> >
> > Someone must have some sort of gauge to measure them....
>
>
> I don't know how you'd measure after it went through a crimp-tool.

** Huh ??

https://en.wikipedia.org/wiki/Coaxial_power_connector


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



.... Phil

[Phil Hobbs]

Sharp calipers are okay for both.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
https://hobbs-eo.com

[Jeff Liebermann]

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.
<https://en.wikipedia.org/wiki/Coaxial_power_connector#Listing_of_DC_coaxial_connectors>
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:
<http://www.ezbuybatteries.com/images/ac-adapter-connector.jpg>
Standards are a good thing. Every company should have some.

--
Jeff Liebermann je...@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

[mike]

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.

[tabb...@gmail.com]

On Monday, 26 February 2018 14:00:58 UTC, Phil Hobbs wrote:

> On 02/24/2018 03:44 AM, tabbypurr wrote:
> > On Saturday, 24 February 2018 08:25:21 UTC, Mike Coon wrote:
> >> In article <ik229dl060m7ifsdp...@4ax.com>,
> >> olds...@tubes.com says...
> >>>
> >>> Do they sell a gauge to measure Coaxial Power Connectors?
> >>> AKA "barrel connectors".
> >>>
> >>> I can get close using a ruler on the outer part of the plug, but those
> >>> pins inside are near impossible to measure.
> >>>
> >>> There are so many variations of them too.
> >>>
> >>> Someone must have some sort of gauge to measure them....
> >>
> >> 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
> >
>
> Sharp calipers are okay for both.
>
> Cheers
>
> Phil Hobbs

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

[Fox's Mercantile]

On 2/26/18 1:21 PM, tabb...@gmail.com wrote:
> 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.

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.

[tabb...@gmail.com]

On Monday, 26 February 2018 20:45:51 UTC, Jeffrey Angus wrote:

> On 2/26/18 1:21 PM, tabbypurr wrote:

> > 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.
>
>
> 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

[Fox's Mercantile]

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

[Phil Hobbs]

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


--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net

http://hobbs-eo.com

[Fox's Mercantile]

On 2/26/18 7:06 PM, Phil Hobbs wrote:
> 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.

[bruce2...@gmail.com]

On Sunday, February 25, 2018 at 11:26:11 PM UTC-5, Phil Allison wrote:
> bruce2...@gmail.com wrote:
>
> ----------------------------
> > olds...@tubes.com wrote:
> > > Do they sell a gauge to measure Coaxial Power Connectors?
> > > AKA "barrel connectors".
> > >
> > > I can get close using a ruler on the outer part of the plug, but those
> > > pins inside are near impossible to measure.
> > >
> > > There are so many variations of them too.
> > >
> > > Someone must have some sort of gauge to measure them....
> >
> >
> > I don't know how you'd measure after it went through a crimp-tool.
>
>
> ** Huh ??

When you hook a coax connector to coax cable, you crimp it with a crimping device so it won't fall off of the coax cable.
(at least I did)

As with every connector, if you crimp it at one end, its inevitably going to change measurement at the other end (though probably not significantly).

[Ralph Mowery]

In article <6597a1c9-c146-4e63...@googlegroups.com>,
bruce2...@gmail.com says...

I think youall are mixing coax power connectors that are used on many
wall cubes to power the electronic devices and the coax connectors like
used on the antenna cable called coax, such as RG-8, RG-6.

The mating areas of the coax power connector are not crimped or any
other thing to change the mating dementions.

[Fox's Mercantile]

On 2/26/18 9:51 PM, bruce2...@gmail.com wrote:
> When you hook a coax connector to coax cable, you crimp it with
> a crimping device so it won't fall off of the coax cable.
> (at least I did)
>
> As with every connector, if you crimp it at one end, its inevitably
> going to change measurement at the other end (though probably not
> significantly).

You're thinking of RF coaxial connectors.
Aside from the fact the don't change at the mating side of the
connector.

Almost coaxial power connectors have solder terminals on the wire side
and they don't change shape either at the connection/interface side.

The center terminal may drift in position if you overheat the connect
during assembly/soldering.

[bruce2...@gmail.com]

Oh. I guess we learn something new every day?

[Jeff Liebermann]

On Mon, 26 Feb 2018 08:03:00 -0800, Jeff Liebermann <je...@cruzio.com>
wrote:
(...)

One more idea.
Buy or make a tapered hole gauge:
<https://www.google.com/search?q=taper+hole+gauge&tbm=isch>
It would need to be made for the purpose to prevent bottoming out on
the connector. I have a few that I made for go/no-go inspection
gauges by grinding a steel rule blank and etching marks with ferric
chloride.

[Jeff Liebermann]

On Mon, 26 Feb 2018 20:06:20 -0500, Phil Hobbs
<pcdhSpamM...@electrooptical.net> wrote:

>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. ;)

>Phil Hobbs

Are you sure that your Mitutoyo calipers are not a counterfeit?
<https://www.youtube.com/results?search_query=mitutoyo+caliper+fake>
I gambled and bought a Mitutoyo Digimatic 500-196-20 for $35. It was
a fake. After cleaning out the shavings from the guts, removing the
burrs, and squaring the jaws so that they were parallel, I did
something that blew up the electronics. Sorry, no photos.

[Phil Hobbs]

On 02/27/2018 12:29 PM, Jeff Liebermann wrote:
> On Mon, 26 Feb 2018 20:06:20 -0500, Phil Hobbs
> <pcdhSpamM...@electrooptical.net> wrote:
>
>> 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. ;)
>> Phil Hobbs
>
> Are you sure that your Mitutoyo calipers are not a counterfeit?
> <https://www.youtube.com/results?search_query=mitutoyo+caliper+fake>
> I gambled and bought a Mitutoyo Digimatic 500-196-20 for $35. It was
> a fake. After cleaning out the shavings from the guts, removing the
> burrs, and squaring the jaws so that they were parallel, I did
> something that blew up the electronics. Sorry, no photos.
>

Well, I bought them some years back from an actual Mitu distributor, so
I'm pretty sure they're real. No swarf, no detectable parallellism
error, no noticeable offset between depth gauge and ID/OD blades, good
battery life, nice case.

My cheap 'n' cheerful Chinese ones are actually quite OK as well.