David,
While making roll cages for race cars, any bend that could kink, we fill the hollow area with wet sand to give support to the inside of the material. Heat it up and bend carefully.

dylan

----- Original Message ----
From: BenT Syncro <syncro@GMAIL.COM>
To: vanagon@GERRY.VANAGON.COM
Sent: Thursday, June 26, 2008 10:36:48 AM
Subject: Re: Square tubing benders ?

On 6/26/08, David Marshall <mailinglist@fastforward.ca> wrote:
>
> I want to metal basket for the rear of my westie.  I want to use
> 3/4" square tubing but would like to use round corners as opposed to
> making 45 degree cuts and having square corners.
>
> Has anyone had
> and success with bending square tubing without it kinking?  If so,
> what method did you use?
>
> David Marshall

Here's a useful site:

http://www.thefabricator.com/TubePipeFabrication/TubePipeFabrication_Article.cfm?ID=23

BenT 2bing