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  1. 31st January 2014, 02:19 PM #1
    sinjin
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    Default Maximum thickness

    Simple but tricky question. If i had a plank of timber 12mm thick and just by chance it had a 1mm bow right in the center.
    Board lenght doesn't matter...say 1000mm for arguement sake.
    I need to plane the board dead flat and also dead parallel what would be the maximum thinkness i could get the plank
    when it is finished. This is a theoretical answer not from a practical point of view. Would the board end up being
    11mm thick or 10mm thick.
    Sinjin
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  2. 31st January 2014 02:19 PM # ADS
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  3. 31st January 2014, 02:28 PM #2
    Rod Gilbert
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    Default

    In a perfect world you should be able to get 11mm thickness.
    Regards Rod.
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  4. 31st January 2014, 02:36 PM #3
    pommyphil
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    !0mm, you must take 1mm off each side. Phil
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  5. 31st January 2014, 02:46 PM #4
    sinjin
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    So far...1 correct and 1 incorrect. Have no doubt this will get some good response
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  6. 31st January 2014, 03:46 PM #5
    tore
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    Default

    11mm
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  7. 31st January 2014, 03:54 PM #6
    artme
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    Thumbs up

    I had a plank like that once. Ended up with a veneer!!!!
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  8. 31st January 2014, 03:58 PM #7
    Oldgreybeard
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    I am with Rod : 11mm. In the centre of the plank you remove 1 mm from the top, but nothing from the bottom.
    Bob
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  9. 31st January 2014, 07:15 PM #8
    artful bodger
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    10mm in my books. If its 1mm out on one side it must e 1mm out on the other (concave/convex). Wood being wood though if you true it up it may well bow again. Quarter sawn is better than backsawn for thinner boards.
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  10. 31st January 2014, 09:29 PM #9
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    Treecycle
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    11mm. You only need to take 1mm off at the centre area on one side. You take 1mm of the wings on the other side.
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  11. 31st January 2014, 10:16 PM #10
    oldrose
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    Quote Originally Posted by Treecycle View Post
    11mm. You only need to take 1mm off at the centre area on one side. You take 1mm of the wings on the other side.
    FWIW Agree
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  12. 31st January 2014, 10:27 PM #11
    elderly
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    Default

    11mm



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  13. 31st January 2014, 11:03 PM #12
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    Dalboy
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    If the board is PAR and warped after this then 11mm if rough sawn then it will probably be less.

    This is in an ideal world and not taking into consideration of any other movement such as twist in length.

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  14. 31st January 2014, 11:23 PM #13
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    11mm. First you take 1mm from the high centre of the bow, making that section 11mm, then you take 1mm from the low ends of the bow, making those sections 11mm.
    ... Steve

    -- Monkey see, monkey do --
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  15. 1st February 2014, 06:09 AM #14
    pommyphil
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    Yes, you do take 1mm of each side but because of the bow the board is 13mm, from a thicknessers point of view so 11mm
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  16. 1st February 2014, 08:35 AM #15
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    Mobyturns
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    Dunno!

    Q. how would wood turners know the answer to this?

    Only a few strange ones own devices called thicknessers.
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