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View Poll Results: Is a glued dovetail joint stronger than an unglued dovetail?

Voters
20. You may not vote on this poll
  • YES

    18 90.00%
  • NO

    1 5.00%
  • wots a dovetail?

    1 5.00%
  • wots glue?

    0 0%
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Results 1 to 15 of 16
  1. #1
    Join Date
    Feb 2003
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    Garvoc VIC AUSTRALIA
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    11,470

    Default Is a Glued Dovetail Joint Stronger Than An Unglued Dovetail

    Well Kiddies,

    That's the question.

    What's your opinion.


    The answer is here

    http://www.amgron.clara.net/dovetail...ltestindex.htm
    Regards, Bob Thomas

    www.wombatsawmill.com

  2. #2
    Join Date
    Jun 2006
    Location
    Barboursville, Virginia USA
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    73
    Posts
    2,364

    Default

    An interesting result. Of course, many of my dovetails are so slack that without glue the whole drawer would just fall apart.
    Cheers,

    Bob



  3. #3
    Join Date
    Aug 2004
    Location
    Tasmania
    Posts
    597

    Default

    Glued has to be stronger. pure physics.
    If you can do it - Do it! If you can't do it - Try it!
    Do both well!

  4. #4
    Join Date
    Oct 2001
    Location
    Warwick, QLD
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    40
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    3,462

    Default

    This is one interesting read. I do agree with Ernknot that theoretically glue should be stronger. Does anyone have any idea why the results were what they were?
    Have a nice day - Cheers

  5. #5
    Join Date
    Jan 2005
    Location
    Stratford, New Zealand
    Age
    57
    Posts
    735

    Default

    Interesting.

    But what they didn't test was repeditive loads. The unglued joins failed by deformation, the pins actually slid and compressed. That indicates there was movement before the actual failure. If that was repeated the join is going to work loose. The glued join failed suddenly when the faces of the pins sheared off, there would have been no movement before the failure.

    So yes I can believe their results, but they aren't a real life test. You dont hook a winch to your drawer fronts and see if you can pull them off. Instead they get pulled and pushed 20 times a day untill they possibly work loose.

    SO back in the real world I suspect the glued joints will actually last longer in service.

    Cheers

    Ian

  6. #6
    Join Date
    Aug 2004
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    Lost in Space
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    49
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    2,377

    Default

    Ermmmmm

    .......................Flawed experiment. A glued dovetail is definately stronger!!!

    REgards Lou:eek:
    Just Do The Best You Can With What You HAve At The Time

  7. #7
    Join Date
    Aug 2003
    Location
    Melbourne - Outer East Foothills
    Posts
    6,790

    Default

    OK, today I'm going to build a picture frame and try unglued butt joints. That should be really strong.
    If at first you don't succeed, give something else a go. Life is far too short to waste time trying.

  8. #8
    Join Date
    Aug 2002
    Location
    Melbourne, Victoria
    Posts
    5,513

    Default

    How can you tell from the reference? They don't give any figures for load that the glued dovetail failed at, only that it was less for wide-angle glued dovetails. What load did narrow angled glued dovetails fail out? By inference, it was greater than the unglued ones.
    "Clear, Ease Springs"
    www.Stu's Shed.com


  9. #9
    Join Date
    Feb 2003
    Location
    Garvoc VIC AUSTRALIA
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    Default

    Quote Originally Posted by Gumby
    OK, today I'm going to build a picture frame and try unglued butt joints. That should be really strong.
    If'n yer stick it tergether with a coupla 3" nails at the appropriate angles then its dovetailed. Strong wifout any glue too.
    Regards, Bob Thomas

    www.wombatsawmill.com

  10. #10
    Join Date
    Jul 2005
    Location
    Victoria
    Posts
    5,214

    Default

    To answer that just ask yourself if you would make someone a chest of drawers and just tap them in with no glue and then deliver it to them that way

  11. #11
    Join Date
    May 2005
    Location
    Turramurra, NSW
    Posts
    2,267

    Default

    The test only applied force in a single, constant direction.

    If lateral force or varied direction force was applied the results would have been diferent.
    Bodgy
    "Is it not enough simply to be able to appreciate the beauty of the garden without it being necessary to believe that there are faeries at the bottom of it? " Douglas Adams

  12. #12
    Join Date
    Feb 2005
    Location
    East Bentleigh, Melbourne, Vic
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    4,494

    Default

    Quote Originally Posted by echnidna
    Well Kiddies,

    That's the question.

    What's your opinion.


    The answer is here

    http://www.amgron.clara.net/dovetail...ltestindex.htm
    Hi Echidna,

    Yep, I've seen that web page too, but note the date: 1958

    Since then modern glues have come a long way, and now materially bond with the timber and itself (well, for the first glue-up anyway), so I'd still stay with my vote of glued D/Ts being stronger than a purely mechanical attachment.

  13. #13
    Join Date
    Nov 2003
    Location
    Sydney
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    49
    Posts
    8,761

    Default

    Didnít have the patience to read the whole thing. It was written in 1958 right? Please donít tell me glue makes it weaker.
    Visit my website at www.myWoodwork.com.au

  14. #14
    Join Date
    Feb 2003
    Location
    Garvoc VIC AUSTRALIA
    Posts
    11,470

    Default

    I see there are many disbelievers on this forum

    so

    I

    have

    a

    real

    treat

    for

    you

    all

    they

    are

    having

    a

    recruitment

    drive

    just

    for

    other

    non-believers


    http://www.alaska.net/~clund/e_djubl...rthsociety.htm
    Regards, Bob Thomas

    www.wombatsawmill.com

  15. #15
    Join Date
    Jul 2003
    Location
    Glen Innes NSW
    Age
    76
    Posts
    623

    Thumbs down Non Matching

    Hi all,

    The two panels in the picture are not from a matched pair, please note the last tail so this could be bs.

    I like the the idea of glued dovetail joints


    Regards Mike

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