Join Date: Mar 2012
Location: santa barbara CA
Ring brazing ooooops!
I've previously heard and seen(prior to seeing this) about the lousy quality of some 70s Raleighs and it was brought up again in this thread:
Here is some insight(sorry for the pun) of inside the brazed lug. I cut up old frames to practice brazing, when I cut up a 1973 Grand Sport initially thought wtf, some worker lost his wedding ring in the top tube? No such luck, it wasn't gold but a brass brazing ring, maybe from hearth brazing process(don't know but guessing).
The frame had failed at the seat tube/top tube lug due to penetration of water at the lug. Unfortunately I already tossed that part of the frame so I couldn't inspect the lug when I discovered the brass ring lodged in the tt/ht lug. I'm guessing the ring was installed in the st/tt area and never melted, then slid down tt and has ben in there for 40 yrs.
I saved the ht and the other day when I picked it up the ring fell out, discolored from the rust in the lug but it shined right up. The ht/tt and ht/dt lug pics both show partially melted brazing rings, maybe enough mtl flowed in the lug to make it sound but I doubt it as the other end at the st wasn't.
Sort of confusing to talk about, here are some pics. Brian
"The older I get the better I was" (from Old Guys Rule t-shirt)
Last edited by calstar; 03-16-13 at 03:27 PM.