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Thread: Cable release thread

  1. #31

    Re: Cable release thread

    Wow, Home Depot....and plug style at that!

  2. #32

    Join Date
    Oct 2018
    Posts
    122

    Re: Cable release thread

    OK. Which thread tap size is correct? 5-44 or 5-48? I have already ordered a 5-44 and have not received yet. I guess I'l do a test tap in a scrap piece of aluminum and check.

  3. #33

    Join Date
    Jul 2006
    Location
    Central Mother Lode, California
    Posts
    458

    Re: Cable release thread

    Neither one is "correct " for the Copal shutter's cable release socket but the 5-48 will be closer.

    Looking further in to this via google I found the assertion more than once that the Copal shutter may/usually/mostly has a straight rather than tapered thread cable release socket. Looking at a couple of my Copal shutters, this seems to be the case. Googling Copal shutter dimensions brings up drawings showing the cable release socket thread has a major diameter of 3.2 mm with a pitch of 0.5 mm. I have not been able to find an M3.2 x 0.5 tap. A pitch of 0.5 mm is very close to 50 threads per inch, 3.2 mm equals .126 inches. A number 5 machine screw has a major diameter of .125 inches. So the diameter is close and the pitch will be off a bit. I DON'T KNOW IF THIS WILL WORK OR NOT. (Sorry for the caps). May be worth a try since spares are apparently still available.

    Now if you could find a 5-50 tap...

    David

  4. #34

    Re: Cable release thread

    Your 5-44 will probably grab just fine but checking with a scrap of aluminum is a good idea. Also experiment with a chamfering tool on the beginning of the hole so that the cable release will go in straight . Good luck!

  5. #35

    Re: Cable release thread

    The difference between a .5 mm thread and a 48tpi thread is about .001” from peak to peak. 44tpi Will add .002” . A taper going into a straight thread doesn’t need to mesh perfectly as it will engage in only a couple of threads at most. Give it a try and see if you can make it work.

  6. #36

    Join Date
    Sep 2003
    Location
    South of Rochester, NY
    Posts
    280

    Re: Cable release thread

    Well, since everyone is now talking about the straight thread and not the tapered one, here's the specs for the staight shutter release threads. I'm trying to attach it here because this is not up on my site yet...

    Click image for larger version. 

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ID:	205675

  7. #37
    Do or do not. There is no try.
    Join Date
    Jan 2007
    Location
    Massachusetts, USA
    Posts
    874

    Re: Cable release thread

    FWIW, McMaster-Carr sell JIS threading taps in addition to standard 3mm x 0.5mm metric taps. No 5-48 taps that I could find, though.

    https://www.mcmaster.com/taps/jis-thread-taps/

  8. #38
    Tin Can's Avatar
    Join Date
    Dec 2011
    Posts
    15,365

    Re: Cable release thread

    Cannot read the specs on my 24" monitor

    Would you please post them in text

    Thank you

    Quote Originally Posted by RichSBV View Post
    Well, since everyone is now talking about the straight thread and not the tapered one, here's the specs for the staight shutter release threads. I'm trying to attach it here because this is not up on my site yet...

    Click image for larger version. 

Name:	CableRealease-straight-specs-1.jpg 
Views:	44 
Size:	40.5 KB 
ID:	205675
    2022

  9. #39

    Join Date
    Apr 2020
    Posts
    216

    Re: Cable release thread

    Quote Originally Posted by Tin Can View Post
    Cannot read the specs on my 24" monitor

    Would you please post them in text

    Thank you
    I started to make a snarky comment, and realized I can't read the numbers either. The source resolution is just too low.

  10. #40
    Jim Jones's Avatar
    Join Date
    Aug 2006
    Location
    Chillicothe Missouri USA
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    2,818

    Re: Cable release thread

    Click image for larger version. 

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ID:	205692
    Here it is again, rescanned from my copy of the original source.

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