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 Post subject: looking for clever hands
PostPosted: Fri Sep 07, 2012 8:44 am 
Dirt Disciple

Joined: Sun Jul 15, 2012 3:50 am
Posts: 73
Location: Tasmania
Hi.

I'm after a machinist who can make me a lock ring for a crank set.

Is there anyone in the retrobike community who can do this sort of thing?

Otherwise I guess I'll just weld it?

(yep ... I've contacted RaceFace and they don't have any more of these)

Thanks in advance for any advice.

Cheers. Frank


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 Post subject:
PostPosted: Fri Sep 07, 2012 9:16 am 
retrobike rider
retrobike rider
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Joined: Sun Feb 19, 2012 10:08 am
Posts: 6836
Location: Nth Somerset, UK
There is bound to be a number of people on the forum who can make a lock ring like that, but I would also suggest finding any local model engineers, the kinds of people who make model steam engines and the like.

There are a few forums covering the subject, and some of the stuff those guys can make is incredible. You are also more likely to find someone a little closer to home.

Good luck with your search.


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 Post subject:
PostPosted: Fri Sep 07, 2012 11:42 am 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
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Joined: Sat Jan 27, 2007 10:35 pm
Posts: 8423
Location: The desolate flats of Cambridgeshire
Are you mad? don't use a model railway engineer! a model motor boat outboard engineer, specialising in the accurate scale reproduction of late model 4 stroke Honda outboard engines would be much better!

Any local engineers/machine shop would be able to make you one. Incredible some of there work undoubtedly is, there's no need to tie it down to hunting a model railway fanatic, there isn't a great amount of detail to it.


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 Post subject:
PostPosted: Fri Sep 07, 2012 12:36 pm 
Old School Grand Master

Joined: Tue Oct 09, 2007 1:55 pm
Posts: 8202
Location: New Forest, UK
My money is on the lockring being the same 24tpi thread as a bottom bracket / freewheel. Try any old fashioned BB lockring first...


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 Post subject:
PostPosted: Fri Sep 07, 2012 12:40 pm 
Retro Guru
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Joined: Tue Sep 21, 2010 8:08 pm
Posts: 1939
Location: East Lothian
hamster wrote:
My money is on the lockring being the same 24tpi thread as a bottom bracket / freewheel. Try any old fashioned BB lockring first...


Good thinking!


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 Post subject:
PostPosted: Fri Sep 07, 2012 3:20 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
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Joined: Sun May 25, 2008 11:03 am
Posts: 18205
Location: Sunny Glasgow
Undo all the bolts.Turn it around to put the crack in a non stress area :?
Personally,i cant see it causing any problems unless the crack is in the arm itself under the lockring :?
Have you checked for that?


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 Post subject:
PostPosted: Fri Sep 07, 2012 3:36 pm 
Anglian AEC / Prison Ship Captain
Anglian AEC / Prison Ship Captain
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Joined: Thu Mar 15, 2007 1:26 am
Posts: 6045
Location: LOWESTOFT the worlds smallest bore fest
i can make you a nice shiney stainless one if you can wait just over a month for me to get back from Venezuela i can even make it so you use a spanner instead of the horrid pin holes :wink:


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 Post subject: lock ring
PostPosted: Fri Sep 07, 2012 11:10 pm 
Dirt Disciple

Joined: Sun Jul 15, 2012 3:50 am
Posts: 73
Location: Tasmania
cannondale king wrote:
i can make you a nice shiney stainless one if you can wait just over a month for me to get back from Venezuela i can even make it so you use a spanner instead of the horrid pin holes :wink:


Hi. Thanks for your offer.

(Venezuela!)

I'll look you up if I can't find someone locally.

Do you see any problem with using a stainless lock ring on an aluminium spider?

Cheers. Frank

PS. And thanks thanks for everyone's advice


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