JB Weld

[PIGEON]

Anyone familiar with this product? I'm contemplating the possibility to use it to swap the existing dropouts on an old road frame with a pair of track ends. Common sense tells me that the bond JB Weld provides will not be strong enough, but I've read of experiences that left the user in awe at the strength of the bond, people are using it for things I never would have thought possible.
What do you think, would it be strong enough?

 

[Easy_Rider]

Surely if you are removing dropouts you will be using a blowtorch..? Then you are half way to brazing :?

If you have ever soldered copper pipes then it's quite a similar process http://en.wikipedia.org/wiki/Brazing

 

[PIGEON]

:?

Haha that's the type of face I was hoping I wouldn't get

Thanks for the input, I have soldered before and I have looked into brazing but it seems a whole lot more difficult, and you need all kinds of gear that I don't have (and half of them I don't know what they are). Also, can you braze aluminium to steel? Because the frame is alu and the track ends are steel.

 

[lewis1641]

you cant braze aluminium as far as i know.

i really want you to try jb weld and i really want it to work!!

 

[Easy_Rider]

:?

Haha that's the type of face I was hoping I wouldn't get

Thanks for the input, I have soldered before and I have looked into brazing but it seems a whole lot more difficult, and you need all kinds of gear that I don't have (and half of them I don't know what they are). Also, can you braze aluminium to steel? Because the frame is alu and the track ends are steel.

I assumed it was a steel frame when you said it was an old road frame. Brazing is not the answer then. So how are you going to remove the old dropouts?

While JB weld may have certain strength, i'm not sure it will provide enough shear stength under shock loads. I think a picture of the dropouts will help.

 

[PIGEON]

Hmmz I'm really just thinking out loud, I'm not rushing into things but now I think an old steel frame would suit the job much better.
I was thinking of cutting off the existing dropouts, and then cut slots into the ends of the stays where the track end would fit in. Pretty much like you see on old steel roadbikes, so why not just use one of those. They're cheaper and you don't have two different materials.
I wish there was someone who tried doing exactly this with JB Weld so I could ask him if it worked The stuff isn't readily available around here though so I'll have to order it from the US. That, plus the fact that I fear it won't work is what's keeping me from trying it out..

 

[elite504]

ummmm. . don't be so silly. .. .
This is not the kind of stuff to use for structural jobs. . . and if you hav a method of getting the heat, brazing is not so hard, just takes practice. . .

 

[The Ken]

I wouldn't recommend it .... but I used it to repair a disc caliper mount and it is fine.
Before casting it up I was able to inlay some metal bolts to create a bit of structure.
As the mount is heavily supported by the fork (old hope type axle mount) it has been fine. I'd still prefer a new mount though.

 

[barry2017]

If you have enough meat around the dropouts, do you think you could grind a bit away to give the adjustment? You don't need much room.

 

[Tad]

This has the makings of another DIY forks thread.

Please don't JB weld new drop outs on to a frame.

You can't braze aluminium, steel yes. It's not that difficult even I learned to silver solder, braze and gas weld at art college, very handy, a lot of my sculpture came out looking rather bicycle like. Check out local evening courses.