Retrobike Forum Index

It is currently Fri Dec 09, 2016 5:31 am

* Login   * Register * Search  * FAQ



Post new topic Reply to topic  [ 50 posts ]  Go to page 1, 2, 3, 4, 5  Next
Author Message
PostPosted: Fri Apr 23, 2010 7:10 pm 
retrobike rider
retrobike rider
User avatar

Joined: Fri Sep 29, 2006 10:02 pm
Posts: 126
Location: the south east, UK
A little hobby of mine that has accelerated since aquiring a mini CNC mill...

Inspired by Grafton, Paul, Ringle etc. The Cantilevers have roughly the same geometry as 986's.

My next step is to produce a few pairs of the cable carriers / hangers and get them anodised, some in purple with silver cable clamps and some in black with red cable clamps.

I will then mod the brakes slightly while creating a low profile version with similar geometry to Grafton / Record OR, probably keeping the main arms silver but the little bits in purple :) I might make some cyclocross versions, depending on how it all goes, motivation / other ideas etc...

Anybody who knows good anodisers in the south east, material suppliers, spring wire suppliers that may be of use please let me know!


Attachments:
DSCF2291.JPG
DSCF2291.JPG [ 55.07 KiB | Viewed 9384 times ]
DSCF2289.JPG
DSCF2289.JPG [ 34.48 KiB | Viewed 9384 times ]
DSCF2286.JPG
DSCF2286.JPG [ 49.25 KiB | Viewed 9384 times ]
DSCF2284.JPG
DSCF2284.JPG [ 56.81 KiB | Viewed 9384 times ]
Top
 Profile  
 
 Post subject:
PostPosted: Fri Apr 23, 2010 7:16 pm 
retrobike rider
retrobike rider
User avatar

Joined: Fri Sep 29, 2006 10:02 pm
Posts: 126
Location: the south east, UK
extra pics


Attachments:
DSCF2292.JPG
DSCF2292.JPG [ 24.59 KiB | Viewed 9379 times ]
DSCF2290.JPG
DSCF2290.JPG [ 26.7 KiB | Viewed 9379 times ]
DSCF2277.JPG
DSCF2277.JPG [ 58.35 KiB | Viewed 9379 times ]
DSCF2282.JPG
DSCF2282.JPG [ 58.39 KiB | Viewed 9379 times ]
Top
 Profile  
 
 Post subject:
PostPosted: Fri Apr 23, 2010 8:37 pm 
Retro Guru
User avatar

Joined: Tue Jul 15, 2008 7:20 am
Posts: 1823
Location: Austria
great work 8)

always nice to have a cnc machine at home or at work :)


Top
 Profile  
 
 Post subject:
PostPosted: Sat Apr 24, 2010 7:29 am 
retrobike rider / Gold Trader
retrobike rider / Gold Trader
User avatar

Joined: Sat Jan 27, 2007 10:35 pm
Posts: 8423
Location: The desolate flats of Cambridgeshire
Hmm as an engineer with 10 yrs experience using solidworks and many ideas on custom MTb components, are you open for comissions? Or perhaps a partnership of mutual advantage?


Top
 Profile  
 
 Post subject:
PostPosted: Sat Apr 24, 2010 8:41 am 
Old School Hero
User avatar

Joined: Tue May 22, 2007 9:44 pm
Posts: 182
Location: Sitting in front of the computer... stooopid!
A bike friendly anodising man...

http://www.radbmx.co.uk/forum/index.php?topic=85558.0


Top
 Profile  
 
 Post subject:
PostPosted: Sat Apr 24, 2010 11:29 am 
retrobike rider
retrobike rider
User avatar

Joined: Fri Sep 29, 2006 10:02 pm
Posts: 126
Location: the south east, UK
Thanks for the link, I was thinking of getting some stans 355 rims anodized then chucking some other bits and bobs in too. I might also try A1 anodising in Crawley. It would be good to keep the cost down on such small parts, they could just be done with a batch of other stuff as I am not in a hurry.

Solidworks is a big step up from what I am using :) Most stuff from Graton aand Ringle was quite 2D and so is the stuff I do. I just produce .dxf files on CAD then run them through software called Lazycam to get the CNC files. There is a lot of manual work after that. My material selection and judgement on thicknesses / strength come from comparing existing designs form Paul / Avid etc. It can be a very time consuming process!

The pic below shows the oulines of the brakes, the tool paths were worked out for the different coloured layers, all 4 arms were included and machined out of the same lump of 2" wide aluminium. It took quite a few hours....


Attachments:
brake outline.jpg
brake outline.jpg [ 18.8 KiB | Viewed 9312 times ]
Top
 Profile  
 
 Post subject:
PostPosted: Sat Apr 24, 2010 6:57 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
User avatar

Joined: Sun Apr 02, 2006 1:03 pm
Posts: 11796
Location: Returning
nice work

arceurotrade kx3 or similar? mach 3 ?

http://www.springmasters.com/
these guys have a huge selection of stuff ,might be of use

made these

Image

Image


Top
 Profile  
 
 Post subject:
PostPosted: Sat Apr 24, 2010 7:34 pm 
retrobike rider
retrobike rider
User avatar

Joined: Fri Sep 29, 2006 10:02 pm
Posts: 126
Location: the south east, UK
Nice Machine Tech look, it takes a lot of effort, what did you do for bearings and springs?

I have a Taig 2019cr mill and am using Mach3 on my old desktop PC.

I thought it would be easy to get some torsion springs like the ones used in shimano cantilevers. They seem hard to find and low quatities seem to be expensive. Mine use 2mm diameter steel wire bought from a model shop. I think the wire is normally used for control rods on radio controlled aircraft. I just need to get the same but in stainless. The spring tension is perfect.

I see there are also some home made machined stems in the main forum, hope to see more. I might start a blog for future updates on what I produce.

Regards


Top
 Profile  
 
 Post subject:
PostPosted: Sat Apr 24, 2010 9:46 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider
User avatar

Joined: Sun Apr 02, 2006 1:03 pm
Posts: 11796
Location: Returning
ahh a tiag

i've home cnc'd an x1 mill ,bought an x3 with the intention of cnc'ing it
but never had the time
i also built a small 200x300 gantry router i use for engraving
i run dolphin cad/cam & auto cad ,tho i sometimes use solidworks and rhino
deskengrave is i nice free program for engraving as well

i do have 1/4 million £ hermle 800 at work along with 3 interacts
thats where the stems were done

i do a lot of motorcycle bits too mostly yamaha lc stuff too

home cnc its a whole other waste of money

fun tho


Top
 Profile  
 
 Post subject:
PostPosted: Sun Apr 25, 2010 3:29 am 
Retro Guru
User avatar

Joined: Thu Jan 01, 2009 1:40 am
Posts: 590
Location: Christchurch, New Zealand
^ Why have one at home when I have keys to work :lol: :lol: :lol:

Nice job on the brakes mate(s)


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 50 posts ]  Go to page 1, 2, 3, 4, 5  Next

All times are UTC [ DST ]


Who is online

Users browsing this forum: No registered users and 5 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:  

About Us

Follow Retrobike

Other cool stuff

All content © 2005-2015 Retrobike unless otherwise stated.
Cookies Policy.
bikedeals - the best bike deals in one place
FatCOGS - Fat Chance Owner's Group

Powered by phpBB® Forum Software © phpBB Group