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Posted by Mullin9 on July 5, 2008, 1:53 am
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I.m thinking about building a bike frame, without the use of welding
equipment.
Will "JB Weld" work for my bike frame?
Is it really as strong and shock resistant, as a weld done by the tig
welder.?
l like to know?
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Posted by Tom Kendrick on July 5, 2008, 10:28 am
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Generally speaking, NO, it won't work.
Sometimes, joints in bike frame are brazed when the joint is correctly
designed for brazing, which requires substantial overlap of the pieces
being joined.
Here's why a non-fusion process won't work for a bike frame. Several
of the joints in a frame are butt joints in tension (forces work to
pull them apart). If you glue them together (which is what a
metal-filled epoxy does) the glue does not have sufficient attachment
to the metal parts of the joint.
When the joint fails, one of the metal parts parts participating in
the joint will just slide out of the JB Weld, leaving both intact but
quite disconnected.
On Fri, 4 Jul 2008 22:53:09 -0700 (PDT), Mullin9
>I.m thinking about building a bike frame, without the use of welding
>equipment.
>Will "JB Weld" work for my bike frame?
>Is it really as strong and shock resistant, as a weld done by the tig
>welder.?
>l like to know?
---- Posted via Pronews.com - Premium Corporate Usenet News Provider ----
http://www.pronews.com offers corporate packages that have access to 100,000+
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Posted by Jim Wilkins on July 5, 2008, 12:03 pm
Please log in for more thread options > >I.m thinking about building a bike frame, without the use of welding
> >equipment.
> >Will "JB Weld" work for my bike frame?
> >Is it really as strong and shock resistant, as a weld done by the tig
> >welder.?
http://www.jbweld.net/products/jbweld.php
JB lists its strength at 3960 PSI, which is a little stronger than the
best values for wood but less than bamboo. So it should be OK for a
spruce, yellow pine or oak bicycle frame but inadequate a frame made
of high-performance bamboo tubing.
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Posted by RJ on July 5, 2008, 12:41 pm
Please log in for more thread options There are all types of epoxy type substances in addition to JB Weld. They
are designed for specific purposes. This is possible with the substance
designed for this application. Built up a shaft two years ago where the
bearing had chewed into the shaft. Machined like metal, has worked like a
new shaft since. Not cheap, $100.00 for a pound. Cheaper than a $1000.00
shaft.
Rick
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Posted by Curt Welch on July 5, 2008, 12:42 pm
Please log in for more thread options > > >I.m thinking about building a bike frame, without the use of welding
> > >equipment.
> > >Will "JB Weld" work for my bike frame?
> > >Is it really as strong and shock resistant, as a weld done by the tig
> > >welder.?
>
> http://www.jbweld.net/products/jbweld.php
>
> JB lists its strength at 3960 PSI, which is a little stronger than the
> best values for wood but less than bamboo. So it should be OK for a
> spruce, yellow pine or oak bicycle frame but inadequate a frame made
> of high-performance bamboo tubing.
For reference, chromoly 4130 steel sometimes used for bikes has a tensile
strength around 60,000 psi. The weakest mild steels I think run in the
30,000 psi range.
J-B Weld is not meant for high stress applications like holding together
bike frames.
--
Curt Welch http://CurtWelch.Com/
curt@kcwc.com http://NewsReader.Com/
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>equipment.
>Will "JB Weld" work for my bike frame?
>Is it really as strong and shock resistant, as a weld done by the tig
>welder.?
>l like to know?