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(Re)bending soft metal castings

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blw
  • Member since
    November 2010
  • From: Richmond, VA
  • 21 posts
(Re)bending soft metal castings
Posted by blw on Sunday, May 27, 2012 3:44 AM

On a whim I took out an ancient Bowser kit that I have had sitting around in storage for many years (probably twenty). I was very disappointed to see that the cab roof was bent. As in:

Any suggestions as to how to undo this? I have no idea how it happened, as it was sitting in its foam, and didn't appear to be unduly pressured. Fortunately I have next to no time invested in it, and I think the casting is still available from Bowser - but it's $48 and I'd rather see if I can do something about it first. But my guess is that this casting is pretty soft and unlikely to tolerate too much in the way of experimentation.

  • Member since
    April 2003
  • From: Clinton, MO, US
  • 4,261 posts
Posted by Medina1128 on Sunday, May 27, 2012 7:21 AM

Try guessing what the radius of the cab was, and go buy some PVC in the diameter that would closely match it. Press the cab roof down on a section of the PVC getting it as close as you can. Make final adjustment with smooth jawed pliers.

  • Member since
    July 2006
  • 3,312 posts
Posted by locoi1sa on Sunday, May 27, 2012 8:30 AM

It appears by the color that it is an old Penn Line lead alloy casting. Before they were cast in Zinc. You can try just finger pressure to reform the roof. Warming it with a heat gun at the fold and using gloves to protect your fingers from the heat should do the trick. After you get it done I would pickle it in some vinegar and rinse and paint it with an automotive primer.

      Pete

 I pray every day I break even, Cause I can really use the money!

 I started with nothing and still have most of it left!

  • Member since
    April 2003
  • From: Clinton, MO, US
  • 4,261 posts
Posted by Medina1128 on Sunday, May 27, 2012 9:20 PM

Pickle it? If you're single, run it through the dishwasher... ONLY if you're single. Trust me on that one.

  • Member since
    August 2005
  • From: S.E. Adirondacks, NY
  • 3,246 posts
Posted by modelmaker51 on Sunday, May 27, 2012 10:17 PM

Medina1128

Pickle it? If you're single, run it through the dishwasher... ONLY if you're single. Trust me on that one.

I was told (by you know who) to make sure I put the trains in with a load of dishes so as not to be wasteful. Even with the trains, the dishes come out clean.Whistling

Jay 

C-415 Build: https://imageshack.com/a/tShC/1 

Other builds: https://imageshack.com/my/albums 

  • Member since
    January 2005
  • From: Kansas City Area
  • 1,161 posts
Posted by gmcrail on Monday, May 28, 2012 1:24 AM

locoi1sa

It appears by the color that it is an old Penn Line lead alloy casting. Before they were cast in Zinc......

      Pete

Nope - That's a Bowser Challenger - zinc.  Finger pressure won't do it.  The PVC pipe trick might work, but whatever is done must be done slowly, to decrease the likelihood of cracking.

---

Gary M. Collins gmcrailgNOSPAM@gmail.com

===================================

"Common Sense, Ain't!" -- G. M. Collins

===================================

http://fhn.site90.net

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