Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Galleries NEW FAQ Contact About Impressum
It is currently Fri Nov 24, 2017 1:23 am

All times are UTC+01:00





Post new topic  Reply to topic  [ 349 posts ]  Go to page 1 2 3 4 524 Next
Author Message
 Post subject: Cryptic cycles
PostPosted: Wed Nov 25, 2015 5:47 am 
Offline
in the industry

Joined: Mon Mar 05, 2012 7:28 am
Posts: 630
Figured I would start a thread on what I've been working on.

All frames start with a cad drawing done with bike cad pro. It allows you to see exactly the proportions of the bike before it is built.

ImageIMG_0166 by kevosinn, on Flickr

Next it's decided on the ride quality, stiffness, style or riding, weight goals etc. and tubes are then created. A mix of several different carbon pre preg materials are used.

Image

Image

Image


Image



I'll post some completed pics and more of the process in the next few days.

_________________
Www.crypticcycles.com Custom carbon frames, bar/stem combos, repair and component tuning.


Last edited by kevosinn on Fri Jun 30, 2017 5:47 pm, edited 7 times in total.

Top
   
PostPosted: Wed Nov 25, 2015 2:54 pm 
Offline

Joined: Sun Aug 08, 2010 5:12 am
Posts: 306
Location: Brasil
Nice to see one more WW member framebuilder! more light development to us. Congrats and sucess!
The fork will chosen based on geometry/ride/style of customer or will a fixed model/geo?


Enviado do meu iPhone usando Tapatalk


Top
   
Posted: Wed Nov 25, 2015 2:54 pm 


Top
   
 
PostPosted: Wed Nov 25, 2015 5:54 pm 
Offline

Joined: Thu Nov 05, 2015 2:48 pm
Posts: 59
Nice to see a special thread dedicated to your frame builds.
I like the mix of different textures...unfortunately I will never be able to purchase a frame from you

Please post as much as possible pictures from the progress and processing


Top
   
PostPosted: Wed Nov 25, 2015 11:57 pm 
Offline
in the industry

Joined: Mon Mar 05, 2012 7:28 am
Posts: 630
Thanks for the kind words guys. I use enve for most forks but I can build a frame to work around any fork. I'm going to offer 3 standard layups and then an option for fully custom layups as well as geometry.

_________________
Www.crypticcycles.com Custom carbon frames, bar/stem combos, repair and component tuning.


Top
   
PostPosted: Thu Nov 26, 2015 1:25 am 
Offline
User avatar

Joined: Fri Apr 04, 2008 2:49 am
Posts: 1489
Location: Europe
I'm liking this thread already! Just keep them pix coming, Kevin! :popcorn:

What BB shell ‘standard’ are you gonna use for your first frame?

_________________
“I always find it amazing that a material can actually sell a product when it’s really the engineering that creates and dictates how well that material will behave or perform.” — Chuck Teixeira

RideWert.com
Wert Cycling on Facebook


Top
   
PostPosted: Thu Nov 26, 2015 2:35 am 
Offline
in the industry

Joined: Mon Mar 05, 2012 7:28 am
Posts: 630
The first frame is getting bb86 but I just made all my own tooling to be able to do bb86, English 68mm and pf 30 and bb386.

_________________
Www.crypticcycles.com Custom carbon frames, bar/stem combos, repair and component tuning.


Top
   
PostPosted: Thu Nov 26, 2015 3:02 am 
Offline
in the industry

Joined: Mon Mar 05, 2012 7:28 am
Posts: 630
Machining new fixtures for BB shells on the lathe.

Image

_________________
Www.crypticcycles.com Custom carbon frames, bar/stem combos, repair and component tuning.


Last edited by kevosinn on Fri Feb 05, 2016 5:52 am, edited 1 time in total.

Top
   
PostPosted: Thu Nov 26, 2015 10:20 am 
Offline
User avatar

Joined: Tue Jul 15, 2014 7:37 pm
Posts: 248
Great thread, I love all this stuff. I modded my own English threaded BB to a PF30. Did you know there's actually an off the shelf carbon tube available with correct internal diameter to accept PF30. Just a thought to save on some tooling :thumbup:


Top
   
PostPosted: Thu Nov 26, 2015 11:50 am 
Offline
Banned

Joined: Tue Apr 15, 2014 9:49 pm
Posts: 1151
Brilliant thread and Kevin is giving us a real insight into custom frame building. :thumbup:

_________________
Xena a demi god among the digital demimonde that is WW community

http://i.imgur.com/hL5v3ai.jpg

https://www.flickr.com/photos/131970499@N02/


Top
   
PostPosted: Thu Nov 26, 2015 6:52 pm 
Offline
in the industry

Joined: Mon Mar 05, 2012 7:28 am
Posts: 630
Thanks! Yes I have found a few places that I could buy pre made tubes from but I own a lathe and mill so making molds and tooling is not too bad! It allows full optimization of all the parts on the bike

_________________
Www.crypticcycles.com Custom carbon frames, bar/stem combos, repair and component tuning.


Top
   
PostPosted: Thu Nov 26, 2015 8:59 pm 
Offline

Joined: Thu Oct 23, 2003 5:18 pm
Posts: 742
Location: Austin
Clannagh wrote:
Great thread, I love all this stuff. I modded my own English threaded BB to a PF30. Did you know there's actually an off the shelf carbon tube available with correct internal diameter to accept PF30. Just a thought to save on some tooling :thumbup:


more importantly the CTE of an aluminum mandrel will make specifying the mandrel OD to produce an exact 45.97mm ID carbon tube very challenging. Its not just the size, thickness/mass of the tube but also temp, dwell of the cook and to further complicate, what kind of and how much carbon in what orientations followed by compaction method. my solid stainless PF30 mandrel went back to a professional grinder 3 times before getting it to a less than 25% reject rate on BBs shell ID. that was after thorough calculations.

you'll get there.

_________________
www.crumptoncycles.com


Top
   
PostPosted: Thu Nov 26, 2015 9:40 pm 
Offline
in the industry

Joined: Mon Mar 05, 2012 7:28 am
Posts: 630
nicrump wrote:
Clannagh wrote:
Great thread, I love all this stuff. I modded my own English threaded BB to a PF30. Did you know there's actually an off the shelf carbon tube available with correct internal diameter to accept PF30. Just a thought to save on some tooling :thumbup:


more importantly the CTE of an aluminum mandrel will make specifying the mandrel OD to produce an exact 45.97mm ID carbon tube very challenging. Its not just the size, thickness/mass of the tube but also temp, dwell of the cook and to further complicate, what kind of and how much carbon in what orientations followed by compaction method. my solid stainless PF30 mandrel went back to a professional grinder 3 times before getting it to a less than 25% reject rate on BBs shell ID. that was after thorough calculations.

you'll get there.


Hey thanks for popping in! I sent you an email back last week did you get it?

And yes it's taken me several test runs with multiple materials to get something I'm happy with. I knew thermal expansion would be an issue so I slowly brought the mandrel down to a size that worked well. Stainless is working the best as you said. And I've tested several different layups after I had one that worked size wise. Talk soon hopefully!

_________________
Www.crypticcycles.com Custom carbon frames, bar/stem combos, repair and component tuning.


Last edited by kevosinn on Tue Feb 09, 2016 6:16 pm, edited 1 time in total.

Top
   
PostPosted: Thu Nov 26, 2015 11:11 pm 
Offline

Joined: Tue Apr 21, 2015 12:20 am
Posts: 235
Nice work; subscribing to this thread. :thumbup:

_________________
2016 Cervelo R5 (Red 22)
Pegoretti Responsorium (SR11)
SuperSix Evo2 Hi-Mod (Force 22)


Top
   
PostPosted: Mon Nov 30, 2015 5:53 pm 
Offline

Joined: Wed Feb 02, 2011 3:48 am
Posts: 1489
Clannagh wrote:
Did you know there's actually an off the shelf carbon tube available with correct internal diameter to accept PF30

[s]From which supplier?[/s]

edit: didn't have the thinking cap on, there's actually a bunch of places that sell 46mm ID tube that should work for PF30 BB's.

I have actually been looking for a webshop selling 44mm ID tube in small amounts... A quick search only seems to find cheap Chinese tubes from eBay/alibaba as far as I can see?


Last edited by jooo on Mon Nov 30, 2015 7:15 pm, edited 2 times in total.

Top
   
PostPosted: Mon Nov 30, 2015 6:41 pm 
Offline

Joined: Mon Jan 31, 2011 2:41 am
Posts: 188
Location: SF Bay Area
That's so cool to see. How do you actually build the tubes?


Top
   
Posted: Mon Nov 30, 2015 6:41 pm 


Top
   
 
Display posts from previous:  Sort by  
Post new topic  Reply to topic  [ 349 posts ]  Go to page 1 2 3 4 524 Next

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Field Cycles

[ Go to page: 1 2 3 4 5 6 ]

in Introduce Yourself / Gallery - Please use metric weights.

leicaman

89

11500

Sat May 13, 2017 7:59 pm

nismosr View the latest post

There are no new unread posts for this topic. Ribble Cycles Review WARNING

[ Go to page: 1 2 3 ]

in Cycle Chat

Mr.Gib

39

5213

Thu Nov 09, 2017 9:59 am

stax View the latest post

There are no new unread posts for this topic. AURA Cycles Exos - Custom Ti

[ Go to page: 1 2 ]

in Introduce Yourself / Gallery - Please use metric weights.

lw11

25

4065

Wed Apr 26, 2017 3:12 pm

Johnny Rad View the latest post

There are no new unread posts for this topic. New wheels for my Victoire Cycles Veloce Columbus XCR

in Road

elfuinha

9

1269

Wed Dec 07, 2016 9:10 pm

elfuinha View the latest post


All times are UTC+01:00


Who is online

Users browsing this forum: No registered users and 6 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Limited