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Damaged thread
Dear All,
Threaded fork was at a metal who very helpfully managed to remove a frozen stem. However the thread on the fork seems to have been damaged. A little filling seems to have helped but the thread is still blocked. Any suggestions? thanks Neil |
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#2
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Damaged thread
Neil Smith wrote:
Dear All, Threaded fork was at a metal who very helpfully managed to remove a frozen stem. However the thread on the fork seems to have been damaged. A little filling seems to have helped but the thread is still blocked. Any suggestions? Find a local bike builder and give him a fiver to run a die down it would be my choice. You can recut a thread with the edge of a very fine half-round file but the chances of getting it wrong are pretty high. Better to stump up a few quid and use the right tool for the job. Tom |
#3
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Damaged thread
Neil Smith wrote:
Dear All, Threaded fork was at a metal who very helpfully managed to remove a frozen stem. However the thread on the fork seems to have been damaged. A little filling seems to have helped but the thread is still blocked. Any suggestions? thanks Neil Depends on your tooling abilities. Either take it to a *good* bike shop who should have the correct die to recut the thread, or take a spare headset nut, heat it until it glows bright red all over and drop it into a bath of cold oil to cool rapidly, then bit by bit use it to nibble down the thread with cutting fluid, carefully checking every ~1/4 ofa turn that you arent damaging the thread further. Personally I'd go with the second option, but only because I like a challenge! |
#4
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Damaged thread
In article , Coyoteboy wrote:
Neil Smith wrote: Threaded fork was at a metal who very helpfully managed to remove a frozen stem. However the thread on the fork seems to have been damaged. A little filling seems to have helped but the thread is still blocked. Any suggestions? Depends on your tooling abilities. Either take it to a *good* bike shop who should have the correct die to recut the thread, or take a spare headset nut, heat it until it glows bright red all over and drop it into a bath of cold oil to cool rapidly, then bit by bit use it to nibble down the thread with cutting fluid, carefully checking every ~1/4 ofa turn that you arent damaging the thread further. Personally I'd go with the second option, but only because I like a challenge! From previous threads, consider filing a few grooves across the threads of the spare nut before hardening it, so it looks more like a typical die. (Well, so it _works_ more like a typical die, but looking at one will tell you what I'm talking about.) |
#5
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Damaged thread
Alan Braggins wrote:
From previous threads, consider filing a few grooves across the threads of the spare nut before hardening it, so it looks more like a typical die. (Well, so it _works_ more like a typical die, but looking at one will tell you what I'm talking about.) Very good point, this will improve the cutting and clearing action. Although I don't suspect anyone asking the original question would actually try this method :-). |
#6
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Damaged thread
Coyoteboy wrote:
Alan Braggins wrote: From previous threads, consider filing a few grooves across the threads of the spare nut before hardening it, so it looks more like a typical die. (Well, so it _works_ more like a typical die, but looking at one will tell you what I'm talking about.) Very good point, this will improve the cutting and clearing action. Although I don't suspect anyone asking the original question would actually try this method :-). I bought a new bike when this happened. Worked for me ;o) |
#7
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Damaged thread
On 12 Nov, 23:21, Nick wrote:
Coyoteboy wrote: Alan Braggins wrote: From previous threads, consider filing a few grooves across the threads of the spare nut before hardening it, so it looks more like a typical die. (Well, so it _works_ more like a typical die, but looking at one will tell you what I'm talking about.) Very good point, this will improve the cutting and clearing action. Although I don't suspect anyone asking the original question would actually try this method :-). I bought a new bike when this happened. Worked for me ;o) http://concepttools.co.uk/p/AE-IMPER...FILE-1549.aspx Pretty good if the thread structure is largely intact and just needs a clean up. Each file has 8 pitches on it. Link for the picture only. No idea about the supplier. Handy thing for the toolbox. |
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