Thanks Thanks:  0
Likes Likes:  0
Needs Pictures Needs Pictures:  0
Picture(s) thanks Picture(s) thanks:  0
Results 1 to 12 of 12
  1. #1
    Join Date
    Apr 2008
    Location
    Parkwood,Qld
    Posts
    30

    Wink Drying & sealing wet turned bowls

    Hi to the brains trust of wood work forum.

    Im a mid range experienced turner who has trouble drying roughed out wet turned bowls. Sometimes I seal (paint or wax) the rough turned bowl on the outside (only), sometimes I don't seal at all ...but in most cases I get shrinkage and reasonable cracking. Timbers include rosewood and Champhor. Bowl diameters approx 6 to 12 inch. I rough turn the bowls to about 1/4inch of their final thickness. I also try and make sure the wall thicknesses are similar...Depending on the time of year in S.E. Qld and timber depends on the drying time. I regularly measure the moisture until I think it has stabilised.

    In every case I can salvage the bowls with lots of glue, refixing, repairing etc.... takes along time and is frustrating.

    Any tips ? Should I seal at all or should I go to Seaworld and ask the seal there ?
    Last edited by Rocky5; 6th November 2011 at 01:41 PM. Reason: Security

  2. # ADS
    Google Adsense Advertisement
    Join Date
    Always
    Location
    Advertising world
    Posts
    Many





     
  3. #2
    Join Date
    Jan 2002
    Location
    Melbourne, Aus.
    Age
    71
    Posts
    12,746

    Default

    LOL.

    I rough turn to a wall thickness of about 10% of the outside bowl diameter.

    Usually do the Seaworld thing on end grain outside and inside and let the bowls sit separately for a few weeks checking every few days. If a check starts, I give it a squirt of cheap CA.

    There are other methods like bagging, dumping a bunch in a cardboard box with some shavings or no shavings, only turning when the moon is full etc etc.

    If by 'cracking' you mean a gap right through the wall, then my best bet is you're turning them too thin.

    Good luck.
    Cheers, Ern

  4. #3
    Join Date
    Apr 2008
    Location
    Parkwood,Qld
    Posts
    30

    Thumbs up Arrr I now know

    Ern

    I think you are on the money. I just measured a few and found I was more likely to be 5% rather than 10%. I always get cracks on the base which is sometimes even thinner.

    One of my thoughts was whether the problem might be the seals bad breath. It really stinks when he's eatin' a fish.

    GCCC

  5. #4
    Join Date
    Sep 2011
    Location
    kallangur qld
    Posts
    1,074

    Default

    Agree with ERN, consider leaving the wet turnings 20-25mm thick , then seal only the exterior, if at all.

    I used to do this then pack in dry shavings in a milk crate, for 6 months.

    Jeff

  6. #5
    Join Date
    Nov 2007
    Location
    belgrave
    Age
    61
    Posts
    7,934

    Default

    I've never bothered sealing, but they get packed with shavings in a box or something. No looking at them all the time either. I just forget 'em until I wonder what was in that box.
    anne-maria.
    T
    ea Lady

    (White with none)
    Follow my little workshop/gallery on facebook. things of clay and wood.

  7. #6
    Join Date
    Sep 2008
    Location
    North Carolina, USA
    Posts
    2,327

    Default

    Do a search on the forum and Google for turning wet wood, drying timber, etc.

    If you get 10 turners together, there will be 15 best ways of drying.

    I have tried many ways, some crack and some don't.
    So much timber, so little time.

    Paul

  8. #7
    Join Date
    Jan 2002
    Location
    Melbourne, Aus.
    Age
    71
    Posts
    12,746

    Default

    LOL.

    That's the gamble.

    Lots of variables.

    Trees cut down in winter: lower moisture content, better prospect of drying without checking.

    Species vary a lot anyway. And the orientation of the blank in the log (or fork) makes a difference.

    My worst batch was a bootload of big pieces of almond cut down in Spring. The stuff had beautiful figure. Despite trying a range of methods - rough turning, blanks cut and dried with bags, no bags, end-grain sealing, fingers crossed for days at a time: only got one successful bowl.

    OTOH, a trailer load of NIP cut in winter ... no drama. Did one 25cm wide bowl green-turned down to final thickness. It went out of round by 1mm only as it dried, no checking.

    Overall, better odds than the pokies for sure and more fun.
    Cheers, Ern

  9. #8
    Join Date
    Feb 2009
    Location
    Bristol, UK
    Age
    66
    Posts
    1,540

    Default

    Hi GCCC,

    I use to have trouble with cracking around the base (the chucking spigot) as well. Asking a friend it was recommended that I smother that area in CA. Wasteful, relatively expensive and I still lost a few.

    Then I had an inspiration - Jubilee clamps around the chuck spigot.

    I had a few and tried them, so far I've never lost a single turning, Vase, Bowl or Platter.

    They are Stainless Steel so do not affect or are not affected by the damp wood or the shaving I bury them in.

    So I bought a pile in an auto-jumble and use them on all my part turnings - works great for me.
    Dragonfly
    No-one suspects the dragonfly!

  10. #9
    Join Date
    Apr 2008
    Location
    Parkwood,Qld
    Posts
    30

    Default

    Wood Forum Brains Trust

    Many many thanks for the responses to my drying problem. At least I know now that it isnt straight forward....

    kind regards, Randal

  11. #10
    Join Date
    Nov 2007
    Location
    belgrave
    Age
    61
    Posts
    7,934

    Default

    Quote Originally Posted by dr4g0nfly View Post
    Hi GCCC,

    I use to have trouble with cracking around the base (the chucking spigot) as well. Asking a friend it was recommended that I smother that area in CA. Wasteful, relatively expensive and I still lost a few.

    Then I had an inspiration - Jubilee clamps around the chuck spigot.

    I had a few and tried them, so far I've never lost a single turning, Vase, Bowl or Platter.

    They are Stainless Steel so do not affect or are not affected by the damp wood or the shaving I bury them in.

    So I bought a pile in an auto-jumble and use them on all my part turnings - works great for me.
    Are they those hose clamps?

    This sort of thing?


    Yep! Answered my own question! Google is handy isn't it!

    Could ne a handy idea some time.
    anne-maria.
    T
    ea Lady

    (White with none)
    Follow my little workshop/gallery on facebook. things of clay and wood.

  12. #11
    Join Date
    Feb 2009
    Location
    Bristol, UK
    Age
    66
    Posts
    1,540

    Default

    Yes Tea-Lady, you've got it,

    I mark the spigot either side of the Jaw No. 1 with a black marker so I know how to set the piece back in the jaws correctly, put the clamp around and do it up tight.

    One clamp is fine for C Jaws, if I've used Gripper Jaws for a vase or deeper bowl, I might put two clamps on to account for the longer spigot depending upon the moisture content of the wood.

    Of course this only works for spigots. for recesses I put my faith in crossed fingers and a big box of shavings!
    Dragonfly
    No-one suspects the dragonfly!

  13. #12
    Join Date
    Jul 2005
    Location
    Flinders Shellharbour
    Posts
    5,727

    Default

    .

    I rough turn to a wall thickness of about 10% of the outside bowl diameter.

    If a check starts, I give it a squirt of cheap CA.

    There are other methods like bagging, dumping a bunch in a cardboard box with some

    Pretty well what I do, putting abunch in cardboard boxes for me get a better result than most others.
    In the box close the lid and check periodically filling any cracks with cheap CA.Camphor should not be a problem, its a very stable timber, providing you have got your wall thickness up around 1"+ or so. I rarely having problems with it.
    Inspiration exists, but it has to find you working. — Pablo Picasso


Similar Threads

  1. which finish for turned bowls?
    By Lance in forum WOODTURNING - GENERAL
    Replies: 8
    Last Post: 5th August 2018, 12:09 AM
  2. First Turned Bowls!
    By Tack Hama in forum WOODTURNING - GENERAL
    Replies: 14
    Last Post: 25th June 2010, 02:18 PM
  3. My First Bowls
    By Old Arn in forum WOODTURNING - GENERAL
    Replies: 15
    Last Post: 26th January 2007, 02:21 PM
  4. drying large bowls?
    By leighd in forum WOODTURNING - GENERAL
    Replies: 16
    Last Post: 22nd October 2004, 12:16 AM
  5. More Bowls
    By DarrylF in forum WOODWORK PICS
    Replies: 4
    Last Post: 27th September 2004, 10:06 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •