Valant cables

Questions about bike hire abroad and everything light bike related. No off-topic chat please

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Rob1519
Posts: 55
Joined: Thu Mar 17, 2011 7:29 pm

by Rob1519

Done and looking forward to seeing the product

eric
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Joined: Tue Nov 11, 2003 9:47 pm
Location: Santa Cruz, California, USA
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by eric

I'm sure its an interesting product but there were too many intrusive personal questions.

by Weenie


di luca
Posts: 5
Joined: Wed Mar 18, 2009 4:59 am

by di luca

done

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DMF
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Joined: Sat Dec 06, 2008 10:14 am
Location: Sweden

by DMF

Just curious, how will this product differ from Carbon Nokons, that admittedly were an absolute failure for real world usage? I gather those were just carbon rather than carbon reinforced nylon, but is the latter really less prone to cracks due to compression?

And will nylon really be truly compressionless?

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valant
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Joined: Thu Mar 07, 2013 11:51 pm

by valant

Once again, thank you guys for best wishes!



@plpete prototype product that I'm using on my bike right now, has no problem flexing around bends, that have 2.5cm (1") radius.


@eric, making the survey I had no intentions in collecting any personal data. I assure you, these informations will be used exclusively for development of the cable set and won't shared in any way.
(P.S. I'm an mechanical engineer and I have basically no experience in making surveys. If I was intrusive I appologize, it was unintentionally :thumbup: )



@DMF thanks for asking! This was out primary concern. The problem with nokon carbon fiber cable set was the combination of production process and the shape of the links. Nokon produced their links on turning machines, cutting them form a pre-made carbon tube. Any kind of cutting a carbon fiber composite once the resin is hardened causes microfractures that weaken the material. These microfractures combined with the male/female cone shape of the links caused the links to break under pressure.

Production process that we're using is injection moulding, to avoid the surface damage caused by cutting mentioned above. The shape of male/female part of the housing link is redesigned in a way, that it generates as little transverse tension as possible.

Regarding the nylon material; On it's own, Nylon's highly compressable compared to aluminium. Once you reinforce it with carbon (or any other fiber), it becomes up to twice as hard, plastic deformation is next to nothing and all this at 1/3 of the weight of the Aluminium.
Keep the wind at your back and the sun on your face!

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sugarkane
in the industry
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Joined: Wed Jan 19, 2011 11:14 am
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by sugarkane

Any chance if the segments been self lined? Like the Aicans.. I links are good but the liner is the worst part about it and it's the high friction point.. Aicans work way better but the segments can be fragile. Eleminate that and you have a winner!

cmdr199212
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Location: Beer City

by cmdr199212

Done, definitely interested to see how these come out!

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valant
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Joined: Thu Mar 07, 2013 11:51 pm

by valant

Hi guys, it's almost three weeks since my last post.
Sice then we've been busy, working on moulds, fine-tuning the design, trying out different variations of the material.

@sugarkane, I considered lining the cables the way you suggested, I even made a prototype that was self lined however it didn't come out as good as I expected it to. The problem is dirt getting inside the lining as the design of cable links is much more "opened" as Aikan's design.

Here are some photos that I took in the past few weeks:

Raw kevlar reinforced nylon composite:
Image

Some prototype cable links, made out of kevlar composite instead of carbon (the material wasn't as good as carbon plus the moulds had to be corrected - therefore the links were s*itty):
Image


Here is the latest product of our development, left is the shifter and right is the brake cable housing... At the moment I'm working on smoothing the surface, as some links apear to be a bit rough:
Image


I'm pretty satisfied with the flexibility:
Image

Compared to Nokon cable housings:
Image
Keep the wind at your back and the sun on your face!

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Berk
Carbon Cowboy
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Location: Slovenia

by Berk

Great!! :thumbup:
Berk PROTO-TYPE Composites - Handmade In Slovenia
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gt5504b
Posts: 74
Joined: Mon Jun 06, 2011 10:09 am

by gt5504b

Looks promising. It will be interesting to see how it feels and shifts. Let us all know how it goes.

deltree
Posts: 198
Joined: Mon Apr 23, 2012 10:21 pm
Location: London, UK

by deltree

What's the weight difference, for say, a 10cm long section of it compared to the Nokon?

russianbear
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Joined: Wed Apr 11, 2012 3:40 am

by russianbear

eric wrote:I'm sure its an interesting product but there were too many intrusive personal questions.


You don't have to participate.

Can't wait to see how it all turns out!

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bura
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by bura

Quote: At the moment I'm working on smoothing the surface, as some links appear to be a bit rough:unquote

Valant,hope you will find a way to polish them . Working on the molds for that reason will make your product heavier :wink:
New molds :noidea:

Wish you all the best on the way to the end product. :thumbup:
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Pugrot
Posts: 62
Joined: Wed May 12, 2010 11:52 am

by Pugrot

Have you considered tumble finishing with shot to clean them up rather trying to perfect the moulds?

Anyway as a fellow mech eng all the best with the project and don't forget that proper testing before release to market involves lots of users in different conditions with different set ups... :D

by Weenie


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Spinnekop
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Joined: Wed Jan 09, 2008 3:03 pm
Location: South Africa

by Spinnekop

Done.

Good luck! Will be keeping an eye open for the product
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No reason or principle contain it or stand against it........"

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