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Tech: Forming a flange without a shrinker

Discussion in 'The Hokey Ass Message Board' started by John_Kelly, Feb 19, 2006.

  1. John_Kelly
    Joined: Feb 19, 2003
    Posts: 535


    These are photo excerpts from a video I'm working on. Using a pair of modified needle nose pliers, a hammer, and a hard flat surface to shrink a flange to make it curve. You form a tuck in the metal and hammer it down which forces the metal to get thicker. This experimental piece took about two hours and over a hundred tucks in a very small area. The angle is 1-1/4"X1-1/4" which is a pretty deep flange to shrink in a small radius.

    A smaller flange would have gone much faster. Because of the amount of shrink, I had to weld up small cracks that started to form. It would have been faster to cut out part of the flange, leaving a smaller area to shrink, then weld in a piece after the part was formed. You'll find the same thing using a shrinker.


    Attached Files:

  2. Levis Classic
    Joined: Oct 7, 2003
    Posts: 4,066

    Levis Classic

  3. chrisman
    Joined: Jun 13, 2002
    Posts: 721


    Can only agree, really nice! I really like these hands-on and useful tech posts, more please!
  4. pimpin paint
    Joined: May 31, 2005
    Posts: 4,937

    pimpin paint
    from so cal

    Hey John,
    Great tech post how-to.....
    Perhaps this will show that the Lancaster shrinkers everybodys so
    ga-ga over arn't the only way to through a curve into a flange?
    Does the video cover which tucks to flatter first, so as to keep
    that shrink hemed in?

    Swankey Devils C.C.

  5. John_Kelly
    Joined: Feb 19, 2003
    Posts: 535


    Thanks really don't have to keep the tucks hemmed in if you get them shaped right, and hit them with a steel hammer. In the past, I've found it useful to make a bunch of tucks and use the outside ones to hold the shape of the inside ones while hammering, but once you get the technique dialed in, this is not necessary.


  6. Bugman
    Joined: Nov 17, 2001
    Posts: 3,483


    I've used this technique a few times myself. It works pretty well. Thanks John for posting it. I've got a question though. What if you wanted a rolled edge instead of a sharp angle like that? Would you do the shrinking then hammer the corner round, or round the corner then shrink it?
  7. mikhett
    Joined: Jan 22, 2005
    Posts: 1,436

    from jackson nj

    Great tip john.I love your website.Im getting started late in life 54 yrs old but i wont be deterred.I raised my family and put my hot rod dreams on hold for35 yrsnow when my wife wants me she just looks in the garage or knows im at my friend marks who has a hot rod garage doing kustoms.First things firstboth my kids went to college and are now on there own now its daddys turn.mike
  8. FiddyFour
    Joined: Dec 31, 2004
    Posts: 9,011


    hand held tucking forks, , , now THATS some cool tech!

    PS... how much lead time do you need on a disc? looks like imma need one of them and a video to get the roof of the willys lookin less like it went through a softball size hail storm :rolleyes:
  9. John_Kelly
    Joined: Feb 19, 2003
    Posts: 535


    Hi Bugman,

    If you mean making the bend that was in the piece before I started tuck shrinking, I would make it first then shrink.

    FiddyFour, Usually a few days lead time is all I need to make shrinking disc.

    Thanks, John
  10. Bruce Lancaster
    Joined: Oct 9, 2001
    Posts: 21,681

    Bruce Lancaster
    Member Emeritus

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