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Thread: Why does my pocket hole joinery ?

  1. #61
    Looks good!

  2. #62
    Warmed up enough to go out and experiment.

    After triple checking that the jig and bit were set properly, I drilled 6 holes in 3/4 ply.
    I set my torque to 8 on my drill and used 1-1/4" coarse screws.

    At least 4 of the 6 blew through.

    I don't know if you can tell from the pics.
    One pic is of the pocket holes and the other the blowoutkreg1.jpgkreg2.jpg

  3. #63
    Quote Originally Posted by Larry Foster View Post
    Warmed up enough to go out and experiment.

    After triple checking that the jig and bit were set properly, I drilled 6 holes in 3/4 ply.
    I set my torque to 8 on my drill and used 1-1/4" coarse screws.

    At least 4 of the 6 blew through.

    I don't know if you can tell from the pics.
    One pic is of the pocket holes and the other the blowoutkreg1.jpgkreg2.jpg
    From the look of the wood in the photos, it appears that your plywood either is wet or was wet for some period of time. Most plywood and specially interior grade, doesn't respond well to getting wet. The glue in the lamination doesn't deal well with the swelling the water causes so a lot of strength is lost. I would suggest you try a couple of joints on some 1 x scrap and see how you fare.

  4. #64
    Lee, you are correct.
    Just happened to be what I had in small enough pieces for quick and dirty.

    After my errand, I'll grab some dry plywood or 1X and try again

  5. #65
    Operator error?

    Just went back to try again, this time with firring strips.

    Made 2 different joints.

    One was a box type joint and the other was like a rail and stile joint.

    Both joints were perfect.

    Hopefully, I can continue with this because I'd hate to start ruining my cabinet grade plywood.

  6. #66
    Join Date
    Sep 2013
    Location
    Wayland, MA
    Posts
    1,314
    I've never had occasion to need a pocket screw, but reading this saga would certainly lead me to go out and buy a Domino! Congrats on getting it working.

  7. #67
    roger, it may be a little preliminary to say I got it working.
    I'd say it worked once.

    Let's see if I can keep it working.

    Otherwise, I'm going to ruin a whole lot of plywood I cut today
    Last edited by Larry Foster; Yesterday at 7:31 PM.

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