Steam Bending after Gluing?

      Gluing boards before bending is not practical, for various reasons. October 13, 2010

I'm making some bowed drawer faces out of quartersawn white oak. Given the friendliness of the material towards steam bending I was going to try that rather than bent lamination but I need more width than the boards I've got - 8" boards, 9-10" fronts. Has anybody tried edge joining boards before bending? Has anyone used urea-formaldehyde glue? I could also bend them and then join them together to get my widths. Does anyone have some knowledge on this?

Forum Responses
(Adhesive Forum)
From contributor F:
I don't think the glue joint will hold up during the steaming and bending no matter what glue you use - heat, moisture, and stress. It will be severely compromised at best. If you’re making no more than a half dozen drawer fronts you could do the steam method but with spring back, timing, and heating you'll do six before you get the details and procedure working consistently. The wide resawn glue up is more dependable with very good results. Use an odd number of plies for a stable curved glue up.

From Gene Wengert, forum technical advisor:
I agree with Contributor F and add that sometimes a piece will crack. That piece is tossed away. If you had them glued, you would have to throw the entire panel.

From contributor Z:
Kiln dried wood does not steam bend very well. You should try to work with partially air dried material (between 15% to 28% MC). The glue joint won't survive the steam or the bend. You could bend your individual planks, dry them, surface the edge, and then glue them up - ideally with a non-creep glue (like the UF you mentioned). Don't forget that if you are steam bending, except for very gentle curves, you will need a steel backing strap to drive the compression to the inside of the curve, which prevents stretching the wood on the outside of the curve. The stretching causes cracks and splits, usually where grain runs out. Hardwood will compress well, but doesn't stretch, unless it's engineered to do so.

Would you like to add information to this article?
Interested in writing or submitting an article?
Have a question about this article?

Have you reviewed the related Knowledge Base areas below?
  • KnowledgeBase: Knowledge Base

  • KnowledgeBase: Adhesives, Gluing and Laminating

  • KnowledgeBase: Woodworking Miscellaneous

  • KnowledgeBase: Woodworking Miscellaneous: Bending Wood

    Would you like to add information to this article? ... Click Here

    If you have a question regarding a Knowledge Base article, your best chance at uncovering an answer is to search the entire Knowledge Base for related articles or to post your question at the appropriate WOODWEB Forum. Before posting your message, be sure to
    review our Forum Guidelines.

    Questions entered in the Knowledge Base Article comment form will not generate responses! A list of WOODWEB Forums can be found at WOODWEB's Site Map.

    When you post your question at the Forum, be sure to include references to the Knowledge Base article that inspired your question. The more information you provide with your question, the better your chances are of receiving responses.

    Return to beginning of article.

    Refer a Friend || Read This Important Information || Site Map || Privacy Policy || Site User Agreement

    Letters, questions or comments? E-Mail us and let us know what you think. Be sure to review our Frequently Asked Questions page.

    Contact us to discuss advertising or to report problems with this site.

    To report a problem, send an e-mail to our Webmaster

    Copyright © 1996-2021 - WOODWEB ® Inc.
    All rights reserved. No part of this publication may be reproduced in any manner without permission of the Editor.
    Review WOODWEB's Copyright Policy.

    The editors, writers, and staff at WOODWEB try to promote safe practices. What is safe for one woodworker under certain conditions may not be safe for others in different circumstances. Readers should undertake the use of materials and methods discussed at WOODWEB after considerate evaluation, and at their own risk.

    WOODWEB, Inc.
    335 Bedell Road
    Montrose, PA 18801

    Contact WOODWEB

  • WOODWEB - the leading resource for professional woodworkers

      Home » Knowledge Base » Knowledge Base Article