Steerer Tube: Replacement on 40's Ballooner fork
03-18-24, 10:06 AM
#1
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Steerer Tube: Replacement on 40's Ballooner fork
This must have been discussed here, but I haven't found it. Show me the way. Thanks, Steve
03-18-24, 10:15 AM
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I can't tell you about replacing it entirely. That might be more for a question in theFramebuilderssub-forum. I don't think many do that as a normal thing.
But since you are likely talking about a steel steerer tube, then cut it off at least a inch or so below where ever a quill stem might get too. And far enough away from the fork crown that the heat of brazing doesn't bother it.
Then braze on another piece of steerer tube of the same ID and OD with a internal union that is at least a half inch into each section of the joined tubes. Then dress up the outside with a file or something to bring the brazed joint back to the OD spec.
But since you are likely talking about a steel steerer tube, then cut it off at least a inch or so below where ever a quill stem might get too. And far enough away from the fork crown that the heat of brazing doesn't bother it.
Then braze on another piece of steerer tube of the same ID and OD with a internal union that is at least a half inch into each section of the joined tubes. Then dress up the outside with a file or something to bring the brazed joint back to the OD spec.
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03-18-24, 01:00 PM
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If you get everything properly clean and close fitting you can use silver solder instead of bronze, significantly lower melting point so no risk of the steerer moving in the crown, and within the ability of a propane torch rather than needing oxy-fuel. I'd go with 7/8" insertion on each side i.e. the width of the inserted tube. Just be sure the solder flows fully, so you can see it all around the other end of the joint.
03-19-24, 04:36 PM
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Not sure what the question is, so I'll guess and answer accordingly.
Assuming you're looking for a new fork for an old frame, odds greatly favor it being a standard (USA) 1" steerer. These are very similar, but different to modern 1" steerers, with a slightly smaller ID, different thread pitch, and different headset standards.
You may search for a vintage USA standard 26" middleweight fork, or use a modern fork, but having to replace the stem and headset.
With more info from you, folks will be able to slot in the details.
Assuming you're looking for a new fork for an old frame, odds greatly favor it being a standard (USA) 1" steerer. These are very similar, but different to modern 1" steerers, with a slightly smaller ID, different thread pitch, and different headset standards.
You may search for a vintage USA standard 26" middleweight fork, or use a modern fork, but having to replace the stem and headset.
With more info from you, folks will be able to slot in the details.
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
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03-19-24, 06:42 PM
#6
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You are right, I was not clear enough. I have a "'44 vintage Rollfast ladies ballooner, which has a steerer tube that has been blown out. I wish to keep the original fork and replace preferably, or repair the steerer tube. Despite my shabby articulation, our members understood and I have gotten some wonderful advice about repairing the tube, Thank you all for those responses. So far not much about removal. I imagine removal to be a less complicated process, and structurally more sound, but I'm here because i really don't know diddley.
Steve
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Steve
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03-19-24, 07:01 PM
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