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Author Topic: Oh no...the bottom bracket  (Read 5923 times)

Thunderchild

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Re: Oh no...the bottom bracket
« Reply #15 on: October 05, 2009, 10:03:52 pm »

Here's a diagram of the carbon frame guts!

http://idriders.com/proflex/resources/carbon_tech_sheet.pdf

Col.


Thanks Colin,  You are da man once again.  Do you know if the bottom bracket pieces in the diagram are the final product or is a tube epoxied into the sleeve as with the seat post tube?  If there is no additional sleeve, I could possible drill a couple of small holes around the bb to allow epoxy to be injected into the frame.  Unless, I had to fill up the entire cavity around the bb. 

I like the super glue idea.  Keep us updated Luke.

Thunderchild
Had: 953, 756
Have:
855 cracked frame
5000
Oz
Evo frame

Colin

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Re: Oh no...the bottom bracket
« Reply #16 on: October 07, 2009, 04:24:56 am »

Here's a diagram of the carbon frame guts!

http://idriders.com/proflex/resources/carbon_tech_sheet.pdf

Col.


Thanks Colin,  You are da man once again.  Do you know if the bottom bracket pieces in the diagram are the final product or is a tube epoxied into the sleeve as with the seat post tube?  If there is no additional sleeve, I could possible drill a couple of small holes around the bb to allow epoxy to be injected into the frame.  Unless, I had to fill up the entire cavity around the bb. 

I like the super glue idea.  Keep us updated Luke.

Thunderchild


Sorry, I don't know.

Looking at my spare frame it looks nothing like any of the info on here!

The pivot faces do not have pin spanner holes and neither does the BB Shell, which looks like a single piece of aluminium with the BB threads cut into it.

confused,,,,,,,
Col.
2001 OzM
2000 OzX
1999 x500
1999 900 Frame
1998 4000se
1998 4000
1997 957 Frame
1997 857 Frames
1997 XP-X (856)
1995/6 x55/x56 Frame
1992 962 Frame
1991 Marin Pine Mountain with a Flex Stem

Luke

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Re: Oh no...the bottom bracket
« Reply #17 on: October 07, 2009, 07:06:01 am »
Yes according to the picture there's another part screwed into the BB shell.
I can safely say for having really poked around and tried to get a blade down between the shell and the carbon, there is a flange of some sort against the inside wall of the carbon.

Whether it's a machined flange onto which the carbon is pressed, or a flange of epoxy to which the carbon is supposed to adhere I can't tell.

My BB was really mobile, I'm convinced there is no way you could slide the shell out to reglue it properly.

So that contradicts the diagram a little.
I reckon they just left out a few details so others wouldn't nick ideas.

Did a storming 35 km climb (1180m vertical off-road in 1H35) up a disused railway track yesterday; lumpy, bumpy, fast, just why I love my 5500. BB still good.

Can't say the same for my lungs this morning though... :P
Warranty replacements due to cracks detected in time (since 1989):
4x 'Dale M2000
3x 'Dale EST
2x steel stumpjumpers
2x 855
2x 856
2x Scott G-Zero +3x swingarms.
85kgs & I only race XC!

Thunderchild

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Re: Oh no...the bottom bracket
« Reply #18 on: October 17, 2009, 10:27:14 pm »
Here is a link to a picture of my Oz's bottom bracket with the separation from frame. 
http://idriders.com/proflex/coppermine/displayimage.php?album=lastup&cat=0&pos=1

Thunderchild
« Last Edit: October 17, 2009, 10:30:32 pm by Thunderchild »
Had: 953, 756
Have:
855 cracked frame
5000
Oz
Evo frame

shovelon

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Re: Oh no...the bottom bracket
« Reply #19 on: October 18, 2009, 11:59:00 am »
I see now that the carbon area is actually cracked. Do you think epoxy can bond it?

Terry
OzM,(Ozzie)
K24000,(Red)
957small,(Shorty)
957Large,(Monty)
956 LE,(Peirce)    <Sold>
Offroad "Proflex" (Serrota),
Serotta CST  titanium softail
McMahon FS

Proflexman

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Re: Oh no...the bottom bracket
« Reply #20 on: October 19, 2009, 02:57:29 am »
Ohhh is everyone talking about epoxy ??
Yumm....... ::)
Can I split ur frame......mad axe man at the ready  ;)

No worries m8

I can repair this for you.
What I need to know is where do you live.
I'll jump on my Zed and pop over.

Those two caps screw onto the main BB housing with the baffle between the two casings.
You wont be able to seperte the frame and I dont advise you to attempt to.
There is an epoxy out there called one ton.
You could try East coast fibreglass supplies in the UK contact them and get advice.

The BB shell housing has a top hat effect on both sides .
The trouble is that when the epoxy breaks loose the face of the epoxy is very shiny, so any new substance poured in may in time break loose, and it will become harder to pour in more two pack epoxy if you have already poured in super glue.
Its only my opinion but I advise you not to apply super glue.
I have spare inserts that I have been buying up, and will did one out and take a piccy so you can see what I mean.
« Last Edit: October 19, 2009, 03:12:50 am by Proflexman »