Hey hey! First time poster here. I’m working on my third frame, and my first that will be fillet brazed. I’m using Tange flat mount drop outs that feature a 17mm OD on the body, with a ~15mm end socket. I’m going to be using 3/4”x.035” 4130 for my chainstays so I can make use of my bending dies. The main body on the dropout is a good slip fit into the 3/4” tube. I have done a test fit up and I’m wondering if anyone can offer some brazing advice for this joint. From what I’ve read it would seem that nickel silver may be the best filler. Any thoughts are absolutely appreciated. Thanks!
If these are the non-stainless version (LR26-S?) then I’d be dumping a whole load of brass in there.
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Thanks! It’s the non stainless version.
Looking forward to the post-braze-and-cleanup pics! Interesting setup.
I’ve only used those drops once, on a lightweight small frame with fairly thinwall tubing, so I had to over-fill the joint with FilletPro so I could taper the joints to a smooth finish, it came out ok. The tubing was a smaller OD than the OD of the dropout at the joint.
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Oh it’s great to see these dropouts in context - I have hunted online and couldn’t find reference. Funny enough I’m doing a very similar Ritchey style fastback seat stay/seat tube assembly as you’ve shared. Looks great!
What diameter seat stay did you use? I’m planning on 1/2”x0.35”
What is going to be tricky is trying to get the relatively thick and heavy dropout to brazing temp without overheating the relatively thin stay tubing. I would suggest that regular brass would be a more forgiving filler metal. The lower flow temp of brass gives you an extra few hundred degrees headroom before you scorch anything.
If I recall, that’s what’s on this frame too.