Is this b*ggered or not

RobFowl

Overtightened bolt on seat tube (I think) came back to it a while later and saw this (or rather bcmf did).
It is full thickness and is on the other side as well.
I think its fooked but if anyone has realistic suggestions fire away....


If not helpful suggestions then look out for a pristine, TT frame in PMO on adverts under my alt a/c Fencer

Chips Lovell

I wouldn't ride it. Is it carbon?

RobFowl

Vladimir Kurtains wrote: »

I wouldn't ride it. Is it carbon?

Aluminium and I might chance it in a tt with a metal brace/band of sorts but am getting less and less comfortable with that idea

triggermortis

It looks banjaxed to me. Might be weldable but wouldn't hold much hope

Donie75

You could drill a hole at the apex of the crack. This will stop the crack from spreading any further. It might be difficult because it's straight thru but it's worth a try.
I've never heard of it being done on a bike but it is used widely in engineering to stop a crack from spreading.

morana

get it welded .. no probs

levitronix

Very easy fix , take off the paint, stick a heat sink on it and weld it, smooth out the weld then touch it back up, if i had of been working in my last job i would of gladly done it

RobFowl

levitronix wrote: »

Very easy fix , take off the paint, stick a heat sink on it and weld it, smooth out the weld then touch it back up, if i had of been working in my last job i would of gladly done it

I think I'll give this a try. If it works I'm up and if not i'm no worse off than now !!

(Also it's only me who'll be using it afterwards)

RO 06

I know a lad that could weld that for you.

Beasty

levitronix wrote: »

if i had of been working in my last job

... so what did you do in your last job? Just sit around all day messing about on the internet?;)

RobFowl

RO 06 wrote: »

I know a lad that could weld that for you.

Cool
Ok to PM you??

RO 06

RobFowl wrote: »

Cool
Ok to PM you??

yeah

doozerie

This reminds me of a friend of mine telling me years ago that his brother had snapped the (brazed on) seat tube bolt hole on his father's racing bike during some routine maintenance. The worrying thing about it was that the seemingly gorilla-ish brother's day job was as helicopter mechanic for the RAF. My friend wondered whether the British countryside was littered with fragments of helicopter that had succumbed to his brother's "routine maintenance".

That's of absolutely no use to you in your predicament I know, but good luck with getting your frame repaired. Oh, and should you be offered a lift in an RAF helicopter, politely decline

Beasty

doozerie wrote: »

That's of absolutely no use to you in your predicament

I wouldn't go that far - at least Rob now knows who to contact next time his helicopter lets him down (assuming he survives of course):D

Hungrycol

I thought aluminium wasn't easy to weld. Thought it was a bit of a specialist thing aka expensive.

cdaly_

Aluminium welding isn't hard but it does require the right equipment. The aluminium oxide surface layer has a higher melting point than the pure aluminium below. An ordinary welder will melt the pure metal below the surface before the surface melts and the whole thing collapses. To weld alu, you need an ac welder. The ac arc does some break down the oxide magic and the rest is just standard gas shielded arc welding...

RobFowl

Beasty wrote: »

I wouldn't go that far - at least Rob now knows who to contact next time his helicopter lets him down (assuming he survives of course):D

He has a point. Every time it's happened so far I just borrow Beasty's Gulfstream (he must be getting a bit miffed ).

puzzle factory

might aswell start drinking fairy liquid if buggered is a fupin curse word now.

levitronix

Beasty wrote: »

... so what did you do in your last job? Just sit around all day messing about on the internet?;)

I dont tig weld anymore, when welding something that thin and that strong you ll have to run high Hz to get a much better bead and avoid the risk of getting to much heat getting into the frame, and you have to clean off all the paint and have it spotless