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PostPosted: Wed Oct 30, 2013 3:01 pm 
Dirt Disciple

Joined: Mon Aug 26, 2013 4:21 pm
Posts: 12
Location: Glasgow
Can any one advise me. The nut that clamps the cable for the front mech has stripped and although there is some thread left there is not enough for the nut to tighten and gain sufficient purchase to hold the cable. Has anyone else overcome this problem and if so what might be the best way.
There is probably just enough room on the rear to place a thin nut but it would probably necessitate filing the casting down. Alternatively re cutting the thread to a larger diameter (6mm?), but there is very little material around the bolt hole and I'm not confident that it will be strong enough to take a larger diameter thread. Is there such a thing as a small helicoil insert? Buy a replacement part.
In an ideal world I can fix it without damaging what is an otherwise an excellent condition and until recently perfectly functioning item.

Any advice much appreciated before attempting to fix this, and permanently scar / bodge and destroy it.
Cheers.


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PostPosted: Wed Oct 30, 2013 4:05 pm 
Retro Guru

Joined: Tue Dec 21, 2010 6:31 pm
Posts: 1111
Instead of cutting a new thread, could you not try using a bolt that's more or less the same size as the hole and a nut on the other side? A lot of derailleurs use a nut and bolt set up to hold the cable instead of having a thread cut into the
cable clamp.

Admittedly it would look a bit of a bodge.

Johnny


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PostPosted: Wed Oct 30, 2013 4:23 pm 
Retro Guru
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Joined: Sun Jul 25, 2010 12:22 pm
Posts: 1994
Location: North Ayrshire
Johnsqual wrote:
Admittedly it would look a bit of a bodge.



priceless!!

:lol:


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PostPosted: Wed Oct 30, 2013 4:32 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
Posts: 8226
Location: Cumbria
Is it a black anodised part?

Shaun


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PostPosted: Wed Oct 30, 2013 5:09 pm 
Dirt Disciple

Joined: Mon Aug 26, 2013 4:21 pm
Posts: 12
Location: Glasgow
yes, it's the black anodised part.


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PostPosted: Wed Oct 30, 2013 5:17 pm 
Old School Grand Master
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Joined: Fri Oct 14, 2011 8:41 pm
Posts: 8226
Location: Cumbria
There goes the option of getting a knackered Nuovo record and swapping the arm over...........

Shaun


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PostPosted: Wed Oct 30, 2013 8:56 pm 
Retro Guru

Joined: Tue Jun 03, 2008 4:31 pm
Posts: 740
Over the years I have had a couple do this. I swap cables and mechs way too much. I'd try the nut job which was ok but eventually just had a blob of alloy weld stuck on. Filed it to shape and drilled and tapped another hole. A careful welder won't damage to much anodising and with careful use of black paint you can get it 95% correct.


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PostPosted: Wed Oct 30, 2013 9:48 pm 
Retro Guru

Joined: Wed Nov 04, 2009 9:57 pm
Posts: 641
get an engineer to fit a Helicoil bringing back to the original size.

thinks its 6mm


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PostPosted: Wed Oct 30, 2013 9:57 pm 
Retro Guru
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Joined: Sun Mar 17, 2013 10:25 pm
Posts: 1262
6mm alan key will be an M5 bolt


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PostPosted: Thu Oct 31, 2013 1:59 am 
r.B.o.T.M. & P.o.T.M. Winner
r.B.o.T.M. & P.o.T.M. Winner
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Joined: Thu Nov 22, 2007 10:51 am
Posts: 2209
Location: Camel Land
You could also buy a replacement mech if all the bodging does not work :)


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