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  1. #1
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    Default Home Made Coping Saw

    Has anyone made a coping or Jewelers saw. I know they are dime a dozen.... but was thinking it would be really cool to make one that was a bit flasher than the usual.
    Found a Youtube Video from a guy who made this one. Thought it was really neat.

    HM Jewelers Saw 1.jpg
    Last edited by Gaza58; 23rd December 2016 at 09:33 AM. Reason: Posted before I was finished

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  3. #2
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    Some of the antique ones are amazingly ornate. If you do make one I will be watching with interest.


    Sent from my iPad using Tapatalk
    …..Live a Quiet Life & Work with your Hands

  4. #3
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    Looks like a doable project. Not on my radar as I have enough already but keen to see one come to life.

  5. #4
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    Yep , I'm in

    Dave TTC
    Turning Wood Into Art

  6. #5
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    Default

    Looks a lot more sturdy than the commercial variety.

    Cheers,
    Joe
    Of course truth is stranger than fiction.
    Fiction has to make sense. - Mark Twain

  7. #6
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    The thought has crossed my mind that a coping saw is a feasible project. From the few I have it seems that the better versions have a more substantial frame which results in superior tensioning and consequently better sawing performance.

    Regards
    paul
    Bushmiller;

    "Power tends to corrupt. Absolute power corrupts, absolutely!"

  8. #7
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    Gaza58

    The original post does not seem to have a link. This is the one I think:

    https://www.youtube.com/watch?v=IFYoTkY6Qi8

    This is another video using plywood. Not so aesthetic, but some interesting techniques:

    https://www.youtube.com/watch?v=2dKpFrktoTA

    Regards
    Paul
    Bushmiller;

    "Power tends to corrupt. Absolute power corrupts, absolutely!"

  9. #8
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    Yes that's the one Paul..... I didn't put the link in the original as I wasn't sure of the protocol for adding links like that. I was thinking changing the Aluminium to brass but wasn't sure if it would end up too heavy.

  10. #9
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    Quote Originally Posted by Gaza58 View Post
    Yes that's the one Paul..... I didn't put the link in the original as I wasn't sure of the protocol for adding links like that. I was thinking changing the Aluminium to brass but wasn't sure if it would end up too heavy.
    Firstly I don't wish to appear negative because that is a very nicely made tool.

    It looks like he's using about 3mm Al plate so to replace that with brass and retain the same weight you would need to use ~1mm thick brass which would not allow for strong tapping and threading.

    Mind you I also wonder about the size/weight of the steel square rod he's using. I assume it's that size because its mild steel because he needs the blade tension but it must make it heavier than ideal. Weight is important factor for the fell of a saw particularly with such a fine blade.

    If a tool steel was used for the main arm the steel could be half as thick and then harden and tempered to still be sparingly enough to provide blade tension. Then with a reduced weight arm using say 2.5 mm bras plate would not make the saw as heavy.

    The other thing I would add is an end knob as they is very useful steadying the saw.

  11. #10
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    Brass is about three times as heavy as aluminium, but you could probably go to thinner material as the brass is stronger and also it is all reinforced by the timber infil, which depending on the wood could become a feature if there is some figure.

    I don't think the extra weight would make a huge difference. It already had more mass than a conventional coping saw (or jeweler's saw) so that is more of the primary issue.

    Regards
    Paul
    Bushmiller;

    "Power tends to corrupt. Absolute power corrupts, absolutely!"

  12. #11
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    Thanks for your thoughts on this, Paul, and Bob........ Ways I thought you could reduce the weight
    Firstly you could take the corners off the main arm from half way long and around the bend so that it was round. I have seen some jewelers saws like that.
    Jewelers saw 1.jpg
    Secondly if you used brass would be to pierce it with some sort of design allowing the wood to come through.
    Here is a design I have been working on... you probably could go way fancier than this.
    Jewelers Saw Build 2.jpg
    I was also thinking of riveting the plates rather than using screws. I have never done anything like this before so may have all sorts of issues that I haven't foreseen.

  13. #12
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    My Aven jewellers saw weighs 175 grams. It's nicely balanced at that weight but another 50 grams wouldn't be noticed, I think.

    Mine has thumbscrews (wing bolts) where the one you are targeting has Allen keys. No doubt preferred due to how often the very fine blades break.

    Arron
    Apologies for unnoticed autocomplete errors.

  14. #13
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    Quote Originally Posted by Gaza58 View Post
    Firstly you could take the corners off the main arm from half way long and around the bend so that it was round. I have seen some jewelers saws like that.
    That will save 21% of the weight so worth doing.
    The arm doesn't even need to be square - it could be round in cross section. A flat section filed along the round will enable the holding screw to register the arm in place relative to the handle

    Secondly if you used brass would be to pierce it with some sort of design allowing the wood to come through.
    Here is a design I have been working on... you probably could go way fancier than this.
    Good idea.

    I was also thinking of riveting the plates rather than using screws.
    I wold use screws so it could be dismantled for future servicing i.e. rust removal from the steel.
    I wouldn't even glue the wood onto the brass but arrange it so the wood is somehow locked in or pinned or screwed in place.
    The then whole tool could be taken to pieces and the brass pieces re-polished when needed

  15. #14
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    IMG_5774a_edited-5 copy.jpgMost common tools are able to be hand made (all the first ones were ). The jewelers saw should be easy enough to do if you want to spend the time. The hacksaw and the junior hacksaw on the left took me weeks to make each (back when I were an apprentice) They are still the saws of choice when I want to use a hacksaw. Of course as we spent so much time making them we didn't want to use them on the job, so the very next thing we did was make another junior hacksaw from a piece of 1/4 rod, bent up in a couple of minutes and chucked in the tool box!

    (And over the years the poor old hacksaw copped a covering with spare paint to prevent the rust as they were only mild steel. Maybe I should strip it back and polish it for old times sake...)

    Regards
    SWK

  16. #15
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    Nice work SWK....... back in the day when apprentices actually learnt how to make things.... shame they are all pushed through now days before they have time to learn anything.

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