Crushed Campy dropout: How would you fix it?
#26
Old fart
Join Date: Nov 2004
Location: Appleton WI
Posts: 24,784
Bikes: Several, mostly not name brands.
Mentioned: 153 Post(s)
Tagged: 0 Thread(s)
Quoted: 3587 Post(s)
Liked 3,400 Times
in
1,934 Posts
From the picture, it appears to be a Campagnolo 1010B dropout, post portacatena drilling, so probably early 80s. These are forged, mild steel dropouts and should be amenable careful bending. The chrome plating may well crack with this, but not necessarily the underlying steel.
I'd say go ahead with bending it back into shape. You're no worse off if it does crack, as the other alternative is already dropout replacement. But as I mentioned, a crack in the chrome does not necessarily mean a crack in the steel, so if you see a crack, pick off the surrounding chrome to visualize the underlying steel.
I'd say go ahead with bending it back into shape. You're no worse off if it does crack, as the other alternative is already dropout replacement. But as I mentioned, a crack in the chrome does not necessarily mean a crack in the steel, so if you see a crack, pick off the surrounding chrome to visualize the underlying steel.
#27
2-Wheeled Fool
Join Date: Sep 2016
Location: New Hampshire
Posts: 2,346
Bikes: Surly Ogre, Brompton
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 1385 Post(s)
Liked 677 Times
in
457 Posts
Is it forged or is it microfusion? I can't tell from here. Old long ones as in gugie's photo are never a problem. Some of the real old ones are not even forged, they're just chromoly and you can do anything to them. Microfusion is gonna crack. Try it and see. If it cracks it was gonna crack and no subtleties of technique would have made the least difference.
#28
Junior Member
Join Date: Oct 2019
Posts: 21
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 5 Post(s)
Likes: 0
Liked 3 Times
in
3 Posts
As it was bent from pressure on the derailleur I would bolt a chunk of steel in it's place and lever on that- I worked in autobody repair and we always tried to reverse the dents as done
#30
Bike Butcher of Portland
Join Date: Jul 2014
Location: Portland, OR
Posts: 11,637
Bikes: It's complicated.
Mentioned: 1299 Post(s)
Tagged: 0 Thread(s)
Quoted: 4680 Post(s)
Liked 5,798 Times
in
2,283 Posts
Waiting for post-pix
__________________
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.
#31
Phyllo-buster
Join Date: Jan 2010
Location: Nova Scotia
Posts: 8,847
Bikes: roadsters, club bikes, fixed and classic
Mentioned: 133 Post(s)
Tagged: 0 Thread(s)
Quoted: 2298 Post(s)
Liked 2,054 Times
in
1,254 Posts
This. I'd prefer hard maple blocks on a woodworkers vise just because I have them. I think the dropout adjuster screws should be in place.
Likes For clubman:
#32
Senior Member
Join Date: Oct 2010
Posts: 8,515
Mentioned: 69 Post(s)
Tagged: 0 Thread(s)
Quoted: 3241 Post(s)
Liked 2,512 Times
in
1,510 Posts
What about a ball joint/tie rod fork? That seems like a good tool for the job.
#35
Senior Member
If this doesn't end well, i.e. two pieces, the hanger could still be useful to someone for a repair.
#36
Disraeli Gears
I would not feel safe riding on that dropout, period. Where it's bent is the weakest portion, with the least metal: the turnaround with the adjuster hole through it. A bend like that has surely exceeded the elastic limit of the material, and it seems to me that the steel must be partially fractured, even if it looks OK.
#37
Not lost wanderer.
Join Date: Jan 2013
Location: Lititz, Pa
Posts: 3,328
Bikes: In USA; 73 Raleigh Super Course dingle speed, 72 Raleigh Gran Sport SS, 72 Geoffry Butler, 81 Centurion Pro-Tour, 74 Gugie Grandier Sportier
Mentioned: 73 Post(s)
Tagged: 0 Thread(s)
Quoted: 885 Post(s)
Liked 990 Times
in
522 Posts
If you are worried about a crack after you straighten it, have it magnafluxed, could be relatively cheap at just about any great motor machine shop.
#38
Senior Member
Thread Starter
Join Date: Aug 2003
Location: Tampa, Florida
Posts: 13,954
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Quoted: 413 Post(s)
Likes: 0
Liked 109 Times
in
78 Posts
Pictures are out of order but....
A. Owner used a variation of the 2 axle technique to open dropout. RD hanger bolt was threaded in and tightened. Its hollow allowing for a screw driver to be passed through. From there it was simply applying even pressure on both sides to open it a bit.
B. The owners with suggested a lead pipe for the final opening. Diameter was big enough to fit over entire lower section. Because it was lead, a sifter material, there was no worry that it'd mar up the drop out. A little leverage on long pipe is all it took
C. I've zoomed in on close up pics (not posted) and I think its OK. There appears to be crack but its not, its metal deformation from when it was compressed then stretched back.
A. Owner used a variation of the 2 axle technique to open dropout. RD hanger bolt was threaded in and tightened. Its hollow allowing for a screw driver to be passed through. From there it was simply applying even pressure on both sides to open it a bit.
B. The owners with suggested a lead pipe for the final opening. Diameter was big enough to fit over entire lower section. Because it was lead, a sifter material, there was no worry that it'd mar up the drop out. A little leverage on long pipe is all it took
C. I've zoomed in on close up pics (not posted) and I think its OK. There appears to be crack but its not, its metal deformation from when it was compressed then stretched back.
Last edited by miamijim; 11-18-19 at 06:50 AM.
#40
2-Wheeled Fool
Join Date: Sep 2016
Location: New Hampshire
Posts: 2,346
Bikes: Surly Ogre, Brompton
Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 1385 Post(s)
Liked 677 Times
in
457 Posts
Looks like just the chrome is cracked a little. Tap it with a small wrench. Does it make a "ting" or a dull sound like a tunk?
Likes For J.Higgins:
#43
Senior Member
Thread Starter
Join Date: Aug 2003
Location: Tampa, Florida
Posts: 13,954
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Quoted: 413 Post(s)
Likes: 0
Liked 109 Times
in
78 Posts
Haha...wish I could take the credit. A lot of it came directly from this thread, I was just an intermediary as the frames 1,000 miles away. I really like the '2 axle technique'. As a side note, the seller bailed and said, 'tough luck'. The shippers insurance said, "tough luck, poor packaging". Paypal came through with the requested partial refund, the buyer filed an "item as not described" claim. In the end it work out ok.
#44
low end rider
Join Date: Sep 2008
Posts: 780
Bikes: 80's. hoarder.
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 56 Post(s)
Liked 43 Times
in
37 Posts
So does it ting or what?
I've found cracks in dishware that way.. couldn't see them easily, but that dull thud is a giveaway.
I've found cracks in dishware that way.. couldn't see them easily, but that dull thud is a giveaway.
Last edited by riva; 11-18-19 at 06:45 PM.
#45
www.theheadbadge.com
Join Date: Sep 2005
Location: Southern Florida
Posts: 28,513
Bikes: https://www.theheadbadge.com
Mentioned: 124 Post(s)
Tagged: 0 Thread(s)
Quoted: 2422 Post(s)
Liked 4,395 Times
in
2,092 Posts
#46
Senior Member
Join Date: Jun 2006
Posts: 20,305
Mentioned: 130 Post(s)
Tagged: 0 Thread(s)
Quoted: 3464 Post(s)
Liked 2,829 Times
in
1,995 Posts
Painter stated he had never seen a frame packed so well.
returned 26 weeks later (est was 12 weeks) not my packaging, dropout partly closed up...
So it goes.
#47
www.theheadbadge.com
Join Date: Sep 2005
Location: Southern Florida
Posts: 28,513
Bikes: https://www.theheadbadge.com
Mentioned: 124 Post(s)
Tagged: 0 Thread(s)
Quoted: 2422 Post(s)
Liked 4,395 Times
in
2,092 Posts
I sent a frame for repaint, made custom wood fillers to fill the whole slot with lands to keep the width dimension, same with the fork, special reusable packing... With instruction to make an easy repeat.
Painter stated he had never seen a frame packed so well.
returned 26 weeks later (est was 12 weeks) not my packaging, dropout partly closed up...
So it goes.
Painter stated he had never seen a frame packed so well.
returned 26 weeks later (est was 12 weeks) not my packaging, dropout partly closed up...
So it goes.
-Kurt
#48
Senior Member
Join Date: Oct 2010
Posts: 8,515
Mentioned: 69 Post(s)
Tagged: 0 Thread(s)
Quoted: 3241 Post(s)
Liked 2,512 Times
in
1,510 Posts
I sent a frame for repaint, made custom wood fillers to fill the whole slot with lands to keep the width dimension, same with the fork, special reusable packing... With instruction to make an easy repeat.
Painter stated he had never seen a frame packed so well.
returned 26 weeks later (est was 12 weeks) not my packaging, dropout partly closed up...
So it goes.
Painter stated he had never seen a frame packed so well.
returned 26 weeks later (est was 12 weeks) not my packaging, dropout partly closed up...
So it goes.
#49
Senior Member
Join Date: May 2008
Location: Fredericksburg, Va
Posts: 9,579
Bikes: '65 Frejus TDF, '73 Bottecchia Giro d'Italia, '83 Colnago Superissimo, '84 Trek 610, '84 Trek 760, '88 Pinarello Veneto, '88 De Rosa Pro, '89 Pinarello Montello, '94 Burley Duet, 97 Specialized RockHopper, 2010 Langster, Tern Link D8
Mentioned: 73 Post(s)
Tagged: 0 Thread(s)
Quoted: 1607 Post(s)
Liked 2,216 Times
in
1,103 Posts
It appears to me that the lower portion of the DO performs two functions. First is the location and mounting of the RD. Second is a surface for clamping. The upper part of the DO supports the weight of the bike and rider and where all the forces are applied, not the lower half. So how robust does it really need to be?
__________________
Bikes don't stand alone. They are two tired.
Bikes don't stand alone. They are two tired.
#50
Senior Member
Thread Starter
Join Date: Aug 2003
Location: Tampa, Florida
Posts: 13,954
Mentioned: 40 Post(s)
Tagged: 0 Thread(s)
Quoted: 413 Post(s)
Likes: 0
Liked 109 Times
in
78 Posts
It appears to me that the lower portion of the DO performs two functions. First is the location and mounting of the RD. Second is a surface for clamping. The upper part of the DO supports the weight of the bike and rider and where all the forces are applied, not the lower half. So how robust does it really need to be?
Likes For miamijim: