Snapped off bottle cage braze on
#1
Senior Member
Thread Starter
Snapped off bottle cage braze on
Any ideas for putting this back on? Braze? I have a basic Home Depot brazing kit. Any chance I can get it back on in a sturdy way without massive paint damage?
Wasn’t planning on refinishing this one
Wasn’t planning on refinishing this one
Likes For thinktubes:
Likes For jackbombay:
#4
Shifting is fun!
Join Date: Aug 2009
Location: South Holland, NL
Posts: 11,000
Bikes: Yes, please.
Mentioned: 279 Post(s)
Tagged: 0 Thread(s)
Quoted: 2193 Post(s)
Liked 4,587 Times
in
1,764 Posts
I'm not familiar with JB Weld, but if it is some sort of super glue, then yes, that's what I would do. And like jackbombay says, prepare the surfaces meticulously.
Likes For non-fixie:
#5
Senior Member
Thread Starter
Sounds promising. Would you trust it? I’m not too familiar with the product and this would be a build for someone else to use as a reliable commuter
#6
Shifting is fun!
Join Date: Aug 2009
Location: South Holland, NL
Posts: 11,000
Bikes: Yes, please.
Mentioned: 279 Post(s)
Tagged: 0 Thread(s)
Quoted: 2193 Post(s)
Liked 4,587 Times
in
1,764 Posts
For re-attaching a seat stay to the seat lug, probably not. But for a bottle cage, sure.
Likes For non-fixie:
#7
Senior Member
Join Date: Jun 2019
Location: Portland Oregon
Posts: 996
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 457 Post(s)
Liked 462 Times
in
270 Posts
Hmmm, I would certainly use it on my own bike, on someone else's the stakes are a bit higher, but its quite tough, JB weld website claims a tensile strength of 3960 pounds per square inch of adhesion surface.
Likes For jackbombay:
#8
Old fart
Join Date: Nov 2004
Location: Appleton WI
Posts: 24,779
Bikes: Several, mostly not name brands.
Mentioned: 153 Post(s)
Tagged: 0 Thread(s)
Quoted: 3583 Post(s)
Liked 3,395 Times
in
1,929 Posts
Not with a fuel/air torch; it would take too long to get up to temperature and cause extensive paint damage. To do it properly, you'll want fuel/oxygen and a high silver content rod. But before that, I'd try JB Weld or something similar, as suggested above. If it fails, you're no worse off than you are now, and can always use a clamp to hold the cage in place.
#9
Senior Member
Join Date: Sep 2017
Location: Eastern Shore, MD
Posts: 2,107
Bikes: Road ready: 1993 Koga Miyata City Liner Touring Hybrid, 1989 Centurion Sport DLX, "I Blame GP" Bridgestone CB-1. Projects: Yea, I got a problem....
Mentioned: 24 Post(s)
Tagged: 0 Thread(s)
Quoted: 753 Post(s)
Liked 735 Times
in
421 Posts
Theres a black locktite thats used for gunsmithing as a basically a silver solder replacement. I think you need a very clean surface for that kind of non gap filling glues.
#10
Senior Member
Join Date: Jun 2006
Posts: 20,305
Mentioned: 130 Post(s)
Tagged: 0 Thread(s)
Quoted: 3464 Post(s)
Liked 2,827 Times
in
1,995 Posts
Wild, maybe a touch of silver at one point of the diamond, maybe, otherwise when flux becomes a structural bonding agent.
mask off well and often, abrade surface, the boss side will be the trick. Picklex 20? (too expensive)
thread a long bolt into the boss as a handle , run a nut to secure, and go at it with a wire wheel on a dremel?
mask off well and often, abrade surface, the boss side will be the trick. Picklex 20? (too expensive)
thread a long bolt into the boss as a handle , run a nut to secure, and go at it with a wire wheel on a dremel?
#11
Senior Member
Join Date: Dec 2014
Location: Central Virginia
Posts: 4,777
Bikes: Numerous
Mentioned: 150 Post(s)
Tagged: 0 Thread(s)
Quoted: 1676 Post(s)
Liked 3,084 Times
in
911 Posts
You can look into a rivnut. That’s how the bosses are secured on my aluminum TT bike.
Edit - rather than bosses, I should say it provides a threaded insert for the bottle cage bolt to secure directly into.
https://en.wikipedia.org/wiki/Rivet_nut
Edit - rather than bosses, I should say it provides a threaded insert for the bottle cage bolt to secure directly into.
https://en.wikipedia.org/wiki/Rivet_nut
__________________
N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '82 Colnago Super, '95 Gios Compact Pro, '95 Carrera Zeus, '84 Basso Gap, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, '84 Paletti Super Prestige, Heron Randonneur
N = '96 Colnago C40, '04 Wilier Alpe D'Huez, '10 Colnago EPS, '85 Merckx Pro, '89 Merckx Century, '86 Tommasini Professional, '04 Teschner Aero FX Pro, '05 Alan Carbon Cross, '86 De Rosa Professional, '82 Colnago Super, '95 Gios Compact Pro, '95 Carrera Zeus, '84 Basso Gap, ‘89 Cinelli Supercorsa, ‘83 Bianchi Specialissima, ‘VO Randonneur, Ritchey Breakaway Steel, '84 Paletti Super Prestige, Heron Randonneur
#13
Senior Member
Join Date: May 2019
Location: Bloomington, IN
Posts: 2,940
Bikes: Paramount, Faggin, Ochsner, Ciocc, Basso
Mentioned: 115 Post(s)
Tagged: 0 Thread(s)
Quoted: 1301 Post(s)
Liked 1,903 Times
in
1,137 Posts
The clown-eye or diamond boss looks like it didn't have any brass under it. You could try cleaning the parts with a Dremmel tool and epoxying the part back in, but even with 2800 psi epoxy it would be weak. If you have a new clown-eye you could use a riv-nut, or even drill the old boss out of the clown-eye and then riv-nut it in. Some epoxy or JB weld under the eye and then touch it up with some enamel paint. All are work arounds, and not as good a re-brazing. But should hold under normal conditions. HTH, MH
#14
señor miembro
Join Date: Dec 2018
Location: Pac NW
Posts: 6,602
Bikes: '70s - '80s Campagnolo
Mentioned: 92 Post(s)
Tagged: 0 Thread(s)
Quoted: 3869 Post(s)
Liked 6,461 Times
in
3,194 Posts
Using a rivnut would ruin some aesthetic. Does the bike warrant aesthetic?
Is it the top or bottom fitting? If bottom, a simple fix, like jb-weld, will probably last longer there.
As non-fixie said, prepare the surfaces meticulously for the epoxy. Use tape on the paint. Follow the jb-weld instructions. Just buy the regular stuff. No need to go overboard.
Is it the top or bottom fitting? If bottom, a simple fix, like jb-weld, will probably last longer there.
As non-fixie said, prepare the surfaces meticulously for the epoxy. Use tape on the paint. Follow the jb-weld instructions. Just buy the regular stuff. No need to go overboard.
#15
Senior Member
Join Date: May 2012
Location: Point Reyes Station, California
Posts: 4,526
Bikes: Indeed!
Mentioned: 92 Post(s)
Tagged: 0 Thread(s)
Quoted: 1506 Post(s)
Liked 3,463 Times
in
1,130 Posts
It looks like it was held on for all these years by nothing more than the paint. The JB Weld will be much stronger.
Brent
Brent
#16
Bikes are okay, I guess.
Join Date: Jan 2015
Location: Richmond, Virginia
Posts: 6,938
Bikes: Waterford Paramount Touring, Giant CFM-2, Raleigh Sports 3-speeds in M23 & L23, Schwinn Cimarron oddball build, Marin Palisades Trail dropbar conversion, Nishiki Cresta GT
Mentioned: 69 Post(s)
Tagged: 0 Thread(s)
Quoted: 2647 Post(s)
Liked 2,446 Times
in
1,557 Posts
I'd use JB Weld and make sure I squished a little down into the tube to sort of "wrap" the binding stuff over the edge of the hole in the tube, like they do in "plaster and lath" walls. Oil the threads on the screw so it does not get stuck.
Likes For thumpism:
#17
Senior Member
Join Date: Jun 2006
Posts: 20,305
Mentioned: 130 Post(s)
Tagged: 0 Thread(s)
Quoted: 3464 Post(s)
Liked 2,827 Times
in
1,995 Posts
Rethinking- Rivnut and a reuse or new diamond "stiffener"
Bringhneli, nova, ceeway, possible sources. JB weld and Rivnut it together in one swoop.
I wonder if there is any braze holding the stiffener to the threaded insert.
Bringhneli, nova, ceeway, possible sources. JB weld and Rivnut it together in one swoop.
I wonder if there is any braze holding the stiffener to the threaded insert.
#18
Senior Member
Join Date: Oct 2018
Location: Whittier
Posts: 872
Bikes: 1973 Colnago Super, Litespeed Classic , Automoto , Pinarello Gavia TSX,Eddy Merckx Corsa Extra,Eddy Merckx EMX-5 , 1982 Moser SL, Concorde TSX, Vitus 979 KAS. Diamant SLX,60's Meteor
Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 235 Post(s)
Liked 947 Times
in
327 Posts
clean it til you get bare metal, JB Weld and your done.
Likes For Manny66:
Likes For Hudson308:
#20
Senior Member
Join Date: Jan 2015
Location: Arnold Maryland
Posts: 330
Bikes: Cervelo S5, Cannondale AL1 Lefty MTB, Trek X01, Trek Farley 7,1951 Raleigh Sport, 57&60 Raleigh Tourist, 70 Raleigh Super Course, 80's Soma Prestiege,72 Raleigh Grand Sports, 85 Club Fuji, 76 Raleigh Competition, 85 Panasonic,70's Peugot u08. & more
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 39 Post(s)
Liked 25 Times
in
17 Posts
Clean it and use JB. As stated before if it does not hold you are no worse off than now. Jb is tough stuff!
#21
Senior Member
Join Date: Dec 2019
Location: South Shore of Long Island
Posts: 2,785
Bikes: 2010 Carrera Volans, 2015 C-Dale Trail 2sl, 2017 Raleigh Rush Hour, 2017 Blue Proseccio, 1992 Giant Perigee, 80s Gitane Rallye Tandem
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1079 Post(s)
Liked 1,019 Times
in
719 Posts
Clean meticulous and install a river nut then grind down the backside of the diamond and drill it out the center so it can slip over the rivnut. Little light epoxy to hold it in place. It'll be purely decorative at that point. Paint the edges to keep it clean.
#22
Senior Member
Join Date: Jan 2004
Location: Madison, WI USA
Posts: 6,149
Mentioned: 50 Post(s)
Tagged: 0 Thread(s)
Quoted: 2362 Post(s)
Liked 1,746 Times
in
1,190 Posts
If it's one of two sets of bosses, you could at least use this set just for a pump, and use the other for a water bottle. I would be.... cautious about the weight of a full water bottle attached to this boss JB Welded to the tube.
Schwinn MTB?
Schwinn MTB?
#23
Senior Member
Thread Starter
Thanks for all the suggestions everyone. It was the bottom boss so I tried JB Weld. It’s been curing since yesterday so I’ll have a look today. Hopefully all good. I’ll update once I check it out
Likes For krems81: