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Thread: long hole, DRILLING?

  1. #1
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    long hole, DRILLING?

    is the lathe the best way to drill a hole 20" long on a wooden blank or would it be better to run a cove bit at the right size and then mate it with another to get the long round hole and just glue or screw back together? am looking to put a section of wood handle over a metal one.
    If in Doubt, Build it Stout!
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  2. #2
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    20" is pretty long to try to drill and keep straight. I would recommend the cove bit method you mentioned .I have done it a few times and it worked pretty well, if you rip the piece carefully the seam is pretty well hidden when glued back together
    I'm supposed to respect my elders, but its getting harder and harder for me to find one now.

  3. #3
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    Ditto!!!
    "Forget the flat stuff slap something on the spinny thing and lets go, we're burning daylight" Bart Leetch
    "If it ain't round you may be a knuckle dragger""Turners drag their nuckles too, they just do it at a higher RPM"Bart

  4. #4
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    Almost any bit that long will begin to wander after it's only a few inches deep. I'd go with routing the cove.
    Jim D.
    Adapt, Improvise, Overcome!

  5. #5
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    You could do it with a lamp (shell) auger and get it ~reasonably~ straight (requires some care in feeding to try and keep it mostly straight). I have a miniature homemade one I use for pre-drilling the holes for the wires in spinning wheel hooks and similar, but that's only ~1/16 or less and a few inches - haven't tried the bigger ones.

    The cove trick is undoubtedly more accurate.

  6. #6
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    ok the coves have it just wanted to ask the wize ones her first before buying a bit..
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  7. #7
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    Gees, Larry. You got talked out of the lathe AGAIN!
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  8. #8
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    How straight does the hole have to be? Is if for something like a lamp? Or is more precision required?

    You could always drill in 10" from each end. The holes at the end would be close enough, and then you'd just need to finagle it to make sure they join in the middle.
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  9. #9
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    Larry,
    I read somewhere that the indians in South America make their blowguns using the cove method... if in your travels you ever made it to the jungles of Brazil and met with the tribes there, you know how long those blow guns are.
    Chuck
    Tellico Plains, TN
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    My parents taught me to respect my elders, but it's getting harder and harder to find any.
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  10. #10
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    Quote Originally Posted by Brent Dowell View Post
    How straight does the hole have to be? Is if for something like a lamp? Or is more precision required?

    You could always drill in 10" from each end. The holes at the end would be close enough, and then you'd just need to finagle it to make sure they join in the middle.
    its going to be a wood handle for a fish spear, so pipe is straight and for the whole process it works better to do the cove method.. now to get it to split,, paper and glue between the two halves so it could be turned round on a lathe after the grove is made..
    If in Doubt, Build it Stout!
    One hand washes the other!
    Don't put off today till tomorrow!

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