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View Full Version : CERROBEND...Tube bending filler



edspedalcars
08-06-2013, 02:27 AM
I've seen this material mentioned in a couple posts

I have found it on ebay, and CS Alloys

Has anyone actually used it?
Is it worth the effort, worth the time, worth the money?

Thanks
Ed

Tradetek
08-06-2013, 05:59 PM
I have not used it but have researched it in the past and heard that it is night and day compared to sand.

Here is a good article on it's use: http://www.hitechalloys.com/hitechalloys_005.htm

The big question that I've never been able to find an answer to, is how much volume a certain weight of the material will fill and thus, how many grams/kg/ounces is required to fill a tube of a certain length, size and shape.

Bill

Ticktock
08-06-2013, 09:34 PM
Bill to do that, you need to know the Specific weight or Specific Gravity of the material---that's it weight per unit wolume. Given its SG, which is simple a comparison to the weight of water,
you calculate the volume of nthe "thing" you want to fill, in cc's, multiply by the SG , and you get an answer in grammes.
Steve G

Tradetek
08-07-2013, 01:18 AM
Thanks Steve

That certainly helps throw Cerrobend out the window for me... I was able to find 2 references, one that it had a SG of 7-11 depending on the alloy (there are several variants), and one that for Cerrobend 158, which seems to be what people are selling on eBay, specifically that said it was 9.7.

So that means that for a 5ft long section of my 1.5" .058 wall tube, it would take approximately 19.5 pounds of Cerrobend to fill the tube, which at $70 per ~1.5 pounds on eBay, means that it would cost about $900 to bend a tube assuming all my math is correct...

That wooden tube bender is looking more and more appealing every day...

edspedalcars
08-07-2013, 01:40 AM
Hi Bill

Yep! Guess the cerrobend is out for me too.

I' m workimg on a new theory of operation, as we speak.

It will be using the , 'bending spring' method, but with a solid rod.

I used it on the kerfed tube today and it worked sweet as apple pie.

I will sleep on the idea, and try it with a new tube tomorrow.

Enjoy
Ed

Tradetek
08-07-2013, 02:17 AM
Haven't heard of that one, if it works, you will definitely need to share.

go1000go
08-07-2013, 02:28 AM
Might be way off.... But on how it's made they bend trombones with frozen water inside, here are some others discussing it

http://www.shopfloortalk.com/forums/archive/index.php?t-36470.html

Ticktock
08-07-2013, 02:48 AM
Not too worried about any maths here--my quick guess came up with $1400 for the same bit of pipe.
But just think--you could do heaps of bends in the same piece of pipe, just to get your moneys worth!
As for me, you and Ed--we will find another way!
Steve G
Still rolling around on the floor at this stage

Ticktock
08-07-2013, 02:51 AM
Now that would work well here in Beijing--just limit bending to a winter time event! Minus 14C should be enough to get a good bend.
Could also explain why no one makes trombones in Central Africa.
Steve G

edspedalcars
08-07-2013, 09:11 AM
Might be way off.... But on how it's made they bend trombones with frozen water inside, here are some others discussing it

http://www.shopfloortalk.com/forums/archive/index.php?t-36470.html

I live in southern california.

So just how do I get a 10' piece of straight tubing into my freezer? OH! Silly me, 'bend' it of course!!!:laugh3:

Ed

darnthedog
08-07-2013, 10:48 AM
Either that or get yourself so liquid nitrogen and run it through the EMT. Then you can cool it of instantly- no waiting. Unfortunately the expense just quadrupled as it is fairly expensive.

Ticktock
08-07-2013, 10:52 AM
Noooo! You got it wrong----Get a bigger freezer!!!@!!!!!!!!!
Steve G

go1000go
08-07-2013, 02:06 PM
You are all limiting your thinking, get you tubes on a plane and get south or north where the temp is naturally colder and do your bending outside, it is only like Brad running from his grinding in a hut and welding in the field, just extending the distance between, lol.

And yes bending it to get it in the freezer would work, but how are you going to bend it, chicken and egg.

So much fun.

edspedalcars
08-07-2013, 04:32 PM
So ! No one has 'actually' used this stuff right? http://forum.atomiczombie.com/images/smilies/smartass2.gif

Thanks so much for all the, 'other' alternatives, though. http://forum.atomiczombie.com/images/smilies/cheesy.gif

I will have to come out of retirement and go back to work to support all these great suggestions.

Thanks sooooo much!

Ed