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Thread: Gluing loose knots.

  1. #1
    Join Date
    Nov 2016
    Location
    Kamiah, ID
    Posts
    280

    Gluing loose knots.

    Have 5k+ bdft of rough sawn blue pine to run through the planer. I've generally removed loose knots, cleaned off the pith and glued them back in with polyurethane glue. Fairly easy on the knots that fall out. For the knots that are snug, but obviously not snug enough to run through the planer, is there a better, easier, quicker way? Wondering if anyone has tried CA glue? Works great for a lot of things, and it's certainly easy, but does it have the structural integrity to stand up to planing? Any other options (besides cutting them out)?

    Planer is a 20" PM w/ helical head.

    Thanks in advance!
    Tim

  2. #2
    Join Date
    Feb 2003
    Location
    Bellingham, WA
    Posts
    1,891
    I use CA glue for this, mostly in alder though.
    JR

  3. #3
    Join Date
    Feb 2008
    Location
    Lawrenceburg, Tenn.
    Posts
    1,130
    I have heard of CA glue or epoxy for this. I have not needed to do it, however.

    Doc
    As Cort would say: Fools are the only folk on the earth who can absolutely count on getting what they deserve.

  4. #4
    Join Date
    Jun 2005
    Location
    Shorewood, WI
    Posts
    832
    I've not used it for that, but System Three makes a water-thin epoxy that soaks into wood well called RotFix.

  5. #5
    I've been using 5 minute epoxy. If you can leave the board flat, the epoxy soaks in pretty good.

    Mike
    Go into the world and do well. But more importantly, go into the world and do good.

  6. #6
    Join Date
    Nov 2016
    Location
    Kamiah, ID
    Posts
    280
    Thank you all! I don't have any epoxy in the shop but I do have some thin, medium and thick CA glue in the shop so I'll start there.
    Tim

  7. #7
    Join Date
    Oct 2007
    Location
    Cache Valley, Utah
    Posts
    1,667
    Quote Originally Posted by Mike Henderson View Post
    I've been using 5 minute epoxy. If you can leave the board flat, the epoxy soaks in pretty good.

    Mike
    Ditto. In fact, if you don't put some tape on the bottom, it'll soak all the way through if the knot goes all the way through.

  8. #8
    Join Date
    Oct 2013
    Location
    Berwick, Nova Scotia, Canada
    Posts
    425
    I simply knock then out with the ball part of a small ball peen hammer and glue them back in using Lee Valley 2002 GF (gap filling).
    Mike

  9. #9
    Quote Originally Posted by Dave Cav View Post
    Ditto. In fact, if you don't put some tape on the bottom, it'll soak all the way through if the knot goes all the way through.
    Thanks for pointing that out. I've experienced that and forgot to include it in my posting. And if you don't put tape on the back, it can glue the board down to your bench

    Mike
    Go into the world and do well. But more importantly, go into the world and do good.

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