|Has anyone tried machining their own hubs?(med.long)||pappy_d|
Sep 17, 2002 7:17 PM
|I absolutely love to do things the most difficult way possible- Building it myself. I have unlimited acess to a machine shop- Lathes and Milling machines as well as acess to several varieties of "aircraft" aluminum (6061 and some others) \
Have any of you experimented with machining your own hubs- I'm hoping to start with a front hub modeled after the American Classic micro. I have all of the basic measurements, but I haven't been able to find what bearings he uses. The local bike shop says I should look into 6000 series cartridge bearings.
Anyone know of any good webpages/resources??
Yes, I know I'm crazy. Been told a thousand times. But at age twenty I've already carved hand drums/didgeridoos, started my own small production winery, built a glass blowing studio, built guitars/amplifiers/effects, so I figure I can take road cycling to the extreme as well.
Sep 17, 2002 9:53 PM
|Cartridge bearings don't seem to do a project like this justice. Why not go the whole distance and create a cup-and-cone hub with loose ball bearings?
If you can manage a front hub, you could probably build yourself a complete track hub-set without having to resort to any pre-fabricated parts. (Other than the ball bearings)
|Building track hubset...||pappy_d|
Sep 17, 2002 11:07 PM
|My initial plan was to build an extremly light weight setup for road riding, but the fixed gear idea sounds like an interesting idea...
I'm not familiar with the setup of a fixed gear rear track hub. Do you know anywhere I can find some good clear images?
I've never ridden a fixed gear /track bike- How are the wheels usually setup? Aero/blade/low spoke count or minimalist rim/light rotational mass?
In making my own hubset I'm looking to make a really lighweight hub set- it seems that using cartridge bearins will allow a more minimalist axel- but thanks for the suggestion it does seem like it worth doing it right. I'll look into my cup bearing options.
|Track experts will know more. . .||czardonic|
Sep 18, 2002 9:31 AM
|but here is a start http://www.branfordbike.com/track/track1.html. Small images, but these are some of your more commonly found brands (at least on the web).
You can get a Suzue Basic rear hub from www.excelsports.com for under $30, and use it as an inexpensive prototype.
My impression is that track parts tend to vary from super light and high-tech to extra sturdy depending on the application. Some of the track riders on this board can probably give you a more definitive opinion about spoke type and count.
Incidentally, I have been running the Suzue Basics on rough roads with no problems. The high flange doesn't appeal to me, but they seem sturdy enough.
|O.K., but think about this, first||Alexx|
Sep 18, 2002 4:56 AM
|You stated "I have unlimited acess to a machine shop- Lathes and Milling machines as well as acess to several varieties of "aircraft" aluminum (6061 and some others)"
While 6061 aluminum is great stuff for airframe bits and for making metal prototypes, It is damn soft. It certainly wouldn't be useful for any kind of bearing race. You will also find out about the limited strength of aluminum. You will also need to know the basics of machine design principles-things like avoiding sharp corners that can become stress risers, designing for the strength of the material, designing to avoid fatigue, etc., etc.
My suggestion to you is this-first design what you want to make in a 3-D FEA program (such as iDeas or ProE), and see if your design is safe. Keep in mind all the load forces, lateral forces, as well as the forces needed to press the bearings in. Consider what type of spoking you will be using, and the resulting forces from the spoke tension. Or, just slap something together, ride it, and hope you don't kill yourself.