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 Post subject: CNC?Machining
PostPosted: Fri Nov 28, 2008 7:10 pm 
Retro Guru
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Joined: Sat Aug 02, 2008 11:14 am
Posts: 388
Location: Blighty
Folks,

I'm thinking about getting a local CNC firm to 'skim' my 1/18" aluminium steerer down to 1"...

Anyone else got any experience in doing this? Is it a wise move? Will it introduce unwanted metal fatigue and breakages...

Any info or advice would be appreciated.

Cheers


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 Post subject:
PostPosted: Fri Nov 28, 2008 7:34 pm 
Devout Dirtbag
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Joined: Wed Jun 25, 2008 11:11 am
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Location: Nottingham
Sounds like a bad idea to me because you'll be reducing the tube thickness. A 1" steerer tube would have the same wall thickness as an 1 1/8" but with a smaller overall diameter. :?


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 Post subject:
PostPosted: Fri Nov 28, 2008 7:38 pm 
Gold Trader
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:roll: what he said chap
+1 for the bad idea clan :wink:


rob


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 Post subject:
PostPosted: Fri Nov 28, 2008 8:04 pm 
BoTM Winner / retrobike rider
BoTM Winner / retrobike rider
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Plus you would be effecting whatever treatment had been applied to the original part


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 Post subject: Re: CNC?Machining
PostPosted: Fri Nov 28, 2008 8:39 pm 
Old School Grand Master
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Joined: Wed Feb 20, 2008 12:21 pm
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Location: Lost in Translation
Muddy Funster wrote:
Is it a wise move?

No! Absolutely not!

Quote:
Any info or advice would be appreciated.

Don't do it! Don't even think about doing it!

:shock:


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 Post subject:
PostPosted: Fri Nov 28, 2008 9:19 pm 
MacModerator
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Post the steerer in the steerer swap section? What kind of fork is it?


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 Post subject:
PostPosted: Fri Nov 28, 2008 10:44 pm 
Retro Guru
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no, silly idea. game over.


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 Post subject:
PostPosted: Fri Nov 28, 2008 11:22 pm 
Retro Guru
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Joined: Mon Aug 25, 2008 4:22 pm
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Location: Melbourne, Australia
I agree, seriously don't bother. the steerer will have sufficient tube thickness and have been heat treated to give it the required strength, CNCing it will weaken it by a large amount.

Can you not find a 1" steerer that will fit?


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 Post subject:
PostPosted: Fri Nov 28, 2008 11:41 pm 
Retro Guru
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Location: leicester
this is nearly as daft a thread as make your own carbon frame lol :lol: seriously,dont do it! post up your needs on the steerer exchange thread instead :D


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 Post subject:
PostPosted: Sat Nov 29, 2008 5:10 pm 
B.o.T.M. Winner / Feature Bike
B.o.T.M. Winner / Feature Bike
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stew-b wrote:
this is nearly as daft a thread as make your own carbon frame lol :lol: seriously,dont do it! post up your needs on the steerer exchange thread instead :D


Not quite as bad as the thread on another site about someone who was going to add extra steerer tube threads by using a hack-saw or a chisel rather than get a bike shop to cut them in with a die!


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