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Old 11-21-2010, 06:35 PM
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Bending Tubing

I thought of a neat trick for bending 3/8 steel tubing while trying to figure out how to make a set of power steering lines for my Jeepster. I needed to start the bend as close as possible to the flare nut, and make the bend with as small of a radius as possible. I made a jig for bending the tubing, but the real trick is to slide a length of spring armor off a 3/16 brake line inside the 3/8 tubing to prevent it from collapsing. After bending the spring can be pulled out easily. I don't know if anyone has tried this, but it worked great for me and would work with any tubing bender.




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Old 11-21-2010, 06:45 PM
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Nice work! Is that main support hoop made from washers?

Russ
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Old 11-21-2010, 06:52 PM
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That's pretty nice looks like it works really well also.



Cole
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Old 11-21-2010, 07:44 PM
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Cool, I will try that the next time I need a tight bend.
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Old 11-21-2010, 07:49 PM
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Nice work!

A guy told me once he used to fill his lines with sand to keep them from collapsing. Anyone ever try this?
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Old 11-21-2010, 07:56 PM
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Yes it does work depending on the wall thickness and how tight (radius) the bend is.
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Old 11-22-2010, 09:37 AM
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Quote:
Originally Posted by Jason Russell
Nice work!

A guy told me once he used to fill his lines with sand to keep them from collapsing. Anyone ever try this?
Sand trick only works on thin wall, will not work on anything other than copper. To work properly the sand must be compressed somehow.

Vince
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Old 11-22-2010, 01:08 PM
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Very cool, I just did the brake lines on my Rambler, that would have came in handy.

Brian
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Old 11-22-2010, 01:59 PM
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I have a simmilar bender but for brake line, I just bend it by hand. just have to do it slow and real careful... good idea about the spring inside. I'v never had much luck bending 3/8" tightly like that
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Old 11-22-2010, 05:13 PM
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A high quality tubing bender will handle tight bends. I have seen some very impressive tubing work by some of our instrument tech's.

Vince
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Old 11-22-2010, 06:55 PM
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Nice job of bending! We have a post that 49 T&C started called "whatdidja-make" you ought to post it up there too!

"Whatdidja make?"
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Old 11-22-2010, 06:59 PM
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Quote:
Originally Posted by Jason Russell
Nice work!

A guy told me once he used to fill his lines with sand to keep them from collapsing. Anyone ever try this?
Any kind of tube bending is a give and take. I have used sand with good success and I have used ball bearings.
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Old 11-22-2010, 07:10 PM
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I've used a similar home made bender made from pulley sheeves. Costs a little more but still a lot less than a bender.
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Old 11-23-2010, 11:07 AM
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Imperial makes tubing benders that will bend tubing very tight. They come in many different sizes. Unfortunately, you need a different bender for each size of tubing. I have 4 or 5 of the Imperials ... and they do work GREAT
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Old 11-23-2010, 12:11 PM
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Quote:
Originally Posted by Jason Russell
Nice work!

A guy told me once he used to fill his lines with sand to keep them from collapsing. Anyone ever try this?
I wouldn't use sand on any lines where abrasion would be an issue such as brake lines, hydraulic lines as any residual sand could cause a system failure.
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