Wall wart power plug jack size?

Discussion in 'General Electronics Chat' started by spinnaker, Jan 8, 2011.

  1. spinnaker

    Thread Starter AAC Fanatic!

    Oct 29, 2009
    4,884
    1,000
    I have a couple of wallwarts. I need to know what size jack that I need for the plugs on the wallwart.


    The one should be easy in that Radio Shack carries it. I bought it before. What is a little confusing is that the OD of the plug measures .22 mm but the Radio Shack one measures .25 mm. I realize a small difference but that makes it harder to size my second jack.

    It measures .137 mm OD The inside hole where the pin goes measures .049 mm but it is very hard to measure accurately as it is hard to get the caliber in there.

    I found the wallwart online here. But I could not find specs.
     
  2. #12

    Expert

    Nov 30, 2010
    16,277
    6,788
    You really need to get your millimeters sorted out. You are asking about things that are 5 to 8 thousandths of an inch O.D.
     
  3. spinnaker

    Thread Starter AAC Fanatic!

    Oct 29, 2009
    4,884
    1,000

    Duh! I guess I have not woken up yet this morning. :) And metrically challenged!.


    OK 2nd try. The big on measures 5.46 O.D. mm but the Radio Shack one that fits is a 5 mm O.D.

    The small one measures 3.40 O.D. With the inside hole around 1.27 mm.
     
  4. The Wraith

    New Member

    Jun 19, 2010
    3
    1
  5. The Wraith

    New Member

    Jun 19, 2010
    3
    1
    spinnaker likes this.
  6. spinnaker

    Thread Starter AAC Fanatic!

    Oct 29, 2009
    4,884
    1,000

    Thanks. That is exactly what I was looking for!

    I stopped at Radio Shack. course they did not have the jack but they had a bunch of plugs. We sized them up and it looks like it might be size G. That seems to be confirmed by the chart.

    There is no way to confirm because they did not have the jack.

    If I could just figure out a way to accurately measure that interior hole.
     
  7. SgtWookie

    Expert

    Jul 17, 2007
    22,182
    1,728
    Kind of an expensive solution, but numbered drills (used in machine work, most frequently for drilling prior to creating threads or drilling out existing threads) are a pretty good way to get sizes. Inside calipers are another method. I bought an 8" digital caliper from Harbor Freight for around $15 on sale a few years back.
     
  8. spinnaker

    Thread Starter AAC Fanatic!

    Oct 29, 2009
    4,884
    1,000
    I have an inside caliper but I don't think I can reach all the way inside, with the caliper I have. I am measuring 1.25 mm I.D. Not sure how accurate that is. Plus I am using a cheap Harbor Freight caliper.
     
  9. tracecom

    AAC Fanatic!

    Apr 16, 2010
    3,869
    1,393
    I guess you don't need this anymore, but someone else might. I put it together some time ago.
     
Loading...