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special guest star
Div 1 Pro
Joined: 23 Oct 2003
Posts: 6939
Location: waiting to jump/going down with pedals on fire
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 Posted: Sat Jun 05, 2010 5:20 pm Post subject: removing rounded expander bolt |
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Just been given quite a nice old skool frame to try and get back on the road
Can someone remind me the best way to get an expander bold with a rounded head out of an old ITM stem going into standard forks
I'd like the frame and forks to be intact after - so grinder is out! Not bothered about the stem |
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pete1001
E, Silver
Joined: 13 May 2008
Posts: 798
Location: when in rome!
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| Posted: Sat Jun 05, 2010 6:31 pm Post subject: |
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Just drill the bolt out from the top, and put a new star nut/expander in when you rebuild it.
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Billynobrakes
Div 1 Pro
Joined: 30 Apr 2003
Posts: 7147
Location: Newark on Trent
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| Posted: Sat Jun 05, 2010 6:57 pm Post subject: |
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| pete1001 wrote: |
| Just drill the bolt out from the top, and put a new star nut/expander in when you rebuild it. |
I'm guessing it's a quill stem?
If you drill out the bolt from the top the stem will seperate from the expander and you'll be able to remove both. It will however be a b1tch to drill the stainless steel!
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special guest star
Div 1 Pro
Joined: 23 Oct 2003
Posts: 6939
Location: waiting to jump/going down with pedals on fire
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| Posted: Sat Jun 05, 2010 8:30 pm Post subject: |
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| Billynobrakes wrote: |
| pete1001 wrote: |
| Just drill the bolt out from the top, and put a new star nut/expander in when you rebuild it. |
I'm guessing it's a quill stem?
If you drill out the bolt from the top the stem will seperate from the expander and you'll be able to remove both. It will however be a b1tch to drill the stainless steel! |
thanks for that - I kmow this is dumb but if the bolt is drilled wont the expanded bolt in the forks still be 'expanded' and therefore difficult to get out |
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TBK
Div 3 Pro
Joined: 28 Oct 2003
Posts: 3984
Location: fighting the demons in my head........
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| Posted: Sat Jun 05, 2010 9:19 pm Post subject: |
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| special guest star wrote: |
| Billynobrakes wrote: |
| pete1001 wrote: |
| Just drill the bolt out from the top, and put a new star nut/expander in when you rebuild it. |
I'm guessing it's a quill stem?
If you drill out the bolt from the top the stem will seperate from the expander and you'll be able to remove both. It will however be a b1tch to drill the stainless steel! |
thanks for that - I kmow this is dumb but if the bolt is drilled wont the expanded bolt in the forks still be 'expanded' and therefore difficult to get out |
Not if you have drilled out the bolt head! Just knock down whats left of the bolt and the wedge or cone will drop down with it, thats if it hasn't already fallen away by itself.
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pete1001
E, Silver
Joined: 13 May 2008
Posts: 798
Location: when in rome!
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| Posted: Sat Jun 05, 2010 9:27 pm Post subject: |
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| special guest star wrote: |
| Billynobrakes wrote: |
| pete1001 wrote: |
| Just drill the bolt out from the top, and put a new star nut/expander in when you rebuild it. |
I'm guessing it's a quill stem?
If you drill out the bolt from the top the stem will seperate from the expander and you'll be able to remove both. It will however be a b1tch to drill the stainless steel! |
thanks for that - I kmow this is dumb but if the bolt is drilled wont the expanded bolt in the forks still be 'expanded' and therefore difficult to get out |
If it is just a case of the bolt having rounded off then as soon as it's gone there nothing holding the expander in place. The cone might fall out of the bottom of the expander straight away, or you might have to give it a gentle tap with a mallet and a screw driver or something. Either way, once the bolt's gone it should come out no problem.
You may find that there's some corrosion inside the steerer tube/expander, though. A bolt shouldn't round off with the amount of torque you put through it to lighten a headset. My bet would be it's seized in there, and whoever you got the frame from rounded it trying to budge the bolt. That makes life a bit more difficult....
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Chrissylaa
E, Gold
Joined: 17 Apr 2009
Posts: 3382
Location: On a hillside desolate.
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| Posted: Sat Jun 05, 2010 9:47 pm Post subject: |
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The bolt probably wont be stainless as this is not good material for bolts.
Drill through the bolt head with an 8mm drill and just tap the remainder of the bolt as you would if you had undone it.
It will come away no problem.
I have done this in the past.
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eastway82
Div 3 Pro
Joined: 20 Nov 2006
Posts: 3965
Location: Normandy, France
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| Posted: Wed Jun 09, 2010 11:41 am Post subject: |
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Before attacking it with a drill, might be worth seeing if you can wedge/hammer a slightly oversized Torx bit in there and get enough purchase to loosen it that way.
Alternatively, if you're not bothered about saving the stem, just saw through the damn thing, bolt included, leaving enough showing so you can get it in a vice if necessary to persuade it to move. |
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Terry Tibbs
E, Gold
Joined: 06 Feb 2009
Posts: 3235
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| Posted: Wed Jun 09, 2010 12:45 pm Post subject: Re: removing rounded expander bolt |
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| special guest star wrote: |
Just been given quite a nice old skool frame to try and get back on the road
Can someone remind me the best way to get an expander bold with a rounded head out of an old ITM stem going into standard forks
I'd like the frame and forks to be intact after - so grinder is out! Not bothered about the stem |
could just cut through the stem? |
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Bally
Div 2 Pro
Joined: 11 Aug 2004
Posts: 5664
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| Posted: Fri Jul 09, 2010 11:49 am Post subject: |
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| Billynobrakes wrote: |
| It will however be a b1tch to drill the stainless steel! |
Unless it's a Cinelli 1R of course.
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Bally: Putting the @rse into Grass.
www.easterleycycling.org.uk/CycleStatsLite.exe for Gears, Revs, Speed, BBAR calc, Pursuit Scheduling etc.
"your power is truly awesome" - John McC
"real class" - George Gilbert" |
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mho
Div 1 Pro
Joined: 28 Jul 2003
Posts: 9577
Location: going round the banking
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| Posted: Sat Jul 17, 2010 2:26 pm Post subject: |
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| did this ever come out? |
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Bally
Div 2 Pro
Joined: 11 Aug 2004
Posts: 5664
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| Posted: Tue Jul 27, 2010 12:27 pm Post subject: |
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| mho wrote: |
| did this ever come out? |
What a 1R (aka Cinelli Record) or the bolt ?
_________________
Bally: Putting the @rse into Grass.
www.easterleycycling.org.uk/CycleStatsLite.exe for Gears, Revs, Speed, BBAR calc, Pursuit Scheduling etc.
"your power is truly awesome" - John McC
"real class" - George Gilbert" |
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