Scarlson saves another!
#1
Senior Member
Thread Starter
Join Date: Dec 2005
Posts: 17,153
Mentioned: 481 Post(s)
Tagged: 0 Thread(s)
Quoted: 3807 Post(s)
Liked 6,676 Times
in
2,607 Posts
Scarlson saves another!
A friend gave me a Bridgestone MB-3 with a bit of a problem:
I rang up @scarlson to see if could repair, and he said eazy peazy.
First we needed a sacrificial canti post (the threaded part at least):
Sam used a trimmed bolt as a means to join the new post and what was left of the old one (not shown is some tapping, filing, and sandblasting). All set for some torching and some silver solder:
Braze complete:
I’ll do a bit more cleaning up, some touch-up paint, and then some sort of beater build. Nice save, Sam!
I rang up @scarlson to see if could repair, and he said eazy peazy.
First we needed a sacrificial canti post (the threaded part at least):
Sam used a trimmed bolt as a means to join the new post and what was left of the old one (not shown is some tapping, filing, and sandblasting). All set for some torching and some silver solder:
Braze complete:
I’ll do a bit more cleaning up, some touch-up paint, and then some sort of beater build. Nice save, Sam!
#2
Senior Member
Join Date: Feb 2013
Location: Alta California
Posts: 14,256
Mentioned: 415 Post(s)
Tagged: 1 Thread(s)
Quoted: 3808 Post(s)
Liked 3,332 Times
in
2,174 Posts
-----
Boss!
-----
Boss!
-----
Likes For juvela:
#3
TXHC
I have this same problem on a Bianchi Volpe, but my bosses aren’t threaded. She’s currently fixed until I remedy the problem.
Glad y’all could keep her on the road.
Glad y’all could keep her on the road.
#4
Senior Member
Join Date: Jun 2010
Location: Medford MA
Posts: 2,089
Bikes: Ron Cooper touring, 1959 Jack Taylor 650b ladyback touring tandem, Vitus 979, Joe Bell painted Claud Butler Dalesman, Colin Laing curved tube tandem, heavily-Dilberted 1982 Trek 6xx, René Herse tandem
Mentioned: 80 Post(s)
Tagged: 0 Thread(s)
Quoted: 964 Post(s)
Liked 1,451 Times
in
723 Posts
Ooooh, you took pictures! I didn't even notice!
Thanks for the shout-out!
I remarked that the frame smelled a bit like sulfur when I first brought it in. We thus surmised that this cut-off canti post must be the work of the devil. Now it smells like Gasflux type H black flux and burnt enamel. I'm going to say it's officially exorcised!
Thanks for the shout-out!
I remarked that the frame smelled a bit like sulfur when I first brought it in. We thus surmised that this cut-off canti post must be the work of the devil. Now it smells like Gasflux type H black flux and burnt enamel. I'm going to say it's officially exorcised!
__________________
Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
Likes For scarlson:
#5
Bike Butcher of Portland
Join Date: Jul 2014
Location: Portland, OR
Posts: 11,634
Bikes: It's complicated.
Mentioned: 1299 Post(s)
Tagged: 0 Thread(s)
Quoted: 4678 Post(s)
Liked 5,795 Times
in
2,281 Posts
Nicely done! Another frame saved, always gives me a warm fuzzy feeling.
__________________
If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.
If someone tells you that you have enough bicycles and you don't need any more, stop talking to them. You don't need that kind of negativity in your life.
Likes For gugie:
#6
...
Join Date: Oct 2021
Location: Whitestone and Rensselaerville, New York
Posts: 1,502
Bikes: Bicycles? Yup.
Mentioned: 8 Post(s)
Tagged: 0 Thread(s)
Quoted: 479 Post(s)
Liked 1,574 Times
in
731 Posts
1989 Centurion Prestige back in hill fighting mode thanks to scarlson 's repair of the broken RD hangar. If he could only weld bigger quads onto my birdy legs.
Last edited by BTinNYC; 05-31-22 at 06:42 AM.
Likes For BTinNYC:
#7
Senior Member
Thread Starter
Join Date: Dec 2005
Posts: 17,153
Mentioned: 481 Post(s)
Tagged: 0 Thread(s)
Quoted: 3807 Post(s)
Liked 6,676 Times
in
2,607 Posts
Found a can of spray paint with a bit left. Good enough match for this beater:
Likes For nlerner:
#9
Senior Member
Join Date: Jun 2010
Location: Medford MA
Posts: 2,089
Bikes: Ron Cooper touring, 1959 Jack Taylor 650b ladyback touring tandem, Vitus 979, Joe Bell painted Claud Butler Dalesman, Colin Laing curved tube tandem, heavily-Dilberted 1982 Trek 6xx, René Herse tandem
Mentioned: 80 Post(s)
Tagged: 0 Thread(s)
Quoted: 964 Post(s)
Liked 1,451 Times
in
723 Posts
You are welcome anytime! Broken bikes and beer are also always welcome.
__________________
Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
Likes For scarlson:
#10
Senior Member
Join Date: Mar 2021
Location: Beaverton, OR
Posts: 1,433
Bikes: You had me at rusty and Italian!!
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 566 Post(s)
Liked 1,047 Times
in
542 Posts
Could one also drill out the threads in the frame and Helicoil? (Obviously I’m not familiar with canti’s)
Last edited by RustyJames; 06-01-22 at 10:02 AM.
#11
Senior Member
Join Date: Jun 2010
Location: Medford MA
Posts: 2,089
Bikes: Ron Cooper touring, 1959 Jack Taylor 650b ladyback touring tandem, Vitus 979, Joe Bell painted Claud Butler Dalesman, Colin Laing curved tube tandem, heavily-Dilberted 1982 Trek 6xx, René Herse tandem
Mentioned: 80 Post(s)
Tagged: 0 Thread(s)
Quoted: 964 Post(s)
Liked 1,451 Times
in
723 Posts
The problem on this bike was that the post that the brake pivots on had been cut short, leaving only a stub with a few threads. My job was to add some length to it, so a brake could fit on it again. I did this by screwing a small threaded stud into the threaded hole in the remaining stub, then threading on a piece of an old cantilever post, and finally brazing everything together using silver. This created a nice robust repair, stronger than the original.
It could also have been done with JB Weld instead of brazing, or even with nothing at all - just a long m6x1 bolt to mount the brake arm with the missing piece screwed on in the middle. But brazed-on, this is a sort of "gold standard" repair, and was pretty interesting/fun to think up and do.
__________________
Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
Owner & co-founder, Cycles René Hubris. Unfortunately attaching questionable braze-ons to perfectly good frames since about 2015. With style.
#12
Senior Member
Join Date: Mar 2021
Location: Beaverton, OR
Posts: 1,433
Bikes: You had me at rusty and Italian!!
Mentioned: 31 Post(s)
Tagged: 0 Thread(s)
Quoted: 566 Post(s)
Liked 1,047 Times
in
542 Posts
The threads were ok, though. I wasn't really repairing threads. A helicoil is only really useful for threads. And it might not work in a stripped canti post either, because the walls of the post are so thin.
The problem on this bike was that the post that the brake pivots on had been cut short, leaving only a stub with a few threads. My job was to add some length to it, so a brake could fit on it again. I did this by screwing a small threaded stud into the threaded hole in the remaining stub, then threading on a piece of an old cantilever post, and finally brazing everything together using silver. This created a nice robust repair, stronger than the original.
It could also have been done with JB Weld instead of brazing, or even with nothing at all - just a long m6x1 bolt to mount the brake arm with the missing piece screwed on in the middle. But brazed-on, this is a sort of "gold standard" repair, and was pretty interesting/fun to think up and do.
The problem on this bike was that the post that the brake pivots on had been cut short, leaving only a stub with a few threads. My job was to add some length to it, so a brake could fit on it again. I did this by screwing a small threaded stud into the threaded hole in the remaining stub, then threading on a piece of an old cantilever post, and finally brazing everything together using silver. This created a nice robust repair, stronger than the original.
It could also have been done with JB Weld instead of brazing, or even with nothing at all - just a long m6x1 bolt to mount the brake arm with the missing piece screwed on in the middle. But brazed-on, this is a sort of "gold standard" repair, and was pretty interesting/fun to think up and do.