Singlespeed & Fixed Gear - Stainless Chainring?

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jondrums
11-04-04, 12:39 PM
Anyone know if its possible to get a Stainless Steel 1/8" chainring for 144bcd (5 arm)?
I know surly makes some but they don't seem to make them for 5 arm 144 (unless I'm wrong).
Also, is there any use to going Stainless on the chainring (anyone else running one)?
labratmatt
11-04-04, 02:13 PM
I've been very happy with machined Al. I'm not sure why someone would go stainless.
glomarduck
11-04-04, 02:22 PM
Find some one with a cnc machine
Surly's website says they don't make the 144mmBCD for 5-arm.
Why would someone use stainless?
Surly says:
Stainless chainrings are tougher than aluminum chainrings. For single-speed and tandem timing chain applications, where the wear isn't shared between 2 or 3 chainrings, our stainless rings will outlast and outperform aluminum.
jondrums
11-04-04, 05:00 PM
I've got a CNC mill glomarduck, but I'm not going to bother if it won't make much difference. Not a trivial project, I must say, and the end result isn't cool enough to justify that kind of time, says I.
glomarduck
11-04-04, 05:33 PM
Why not if I had a cnc I'd make so much stuff. Also I do need to find some one with a cnc for a non bike project.
jondrums
11-04-04, 05:37 PM
so, I only have so much spare time for fun projects. a stainless chainring is much less cool than some of the other things I have in mind.
FixinInTraffic
11-04-04, 06:05 PM
well, where the chainline is nearly perfect, the wear is much less than in a derailleur system. people doing lots of miles on Rohloffs have to replace their cogs fairly seldom.
For jumping or other abuse I could see it, but then why are you using track or old campy cranks?
jondrums
11-04-04, 06:13 PM
alright sounds like i have no need for SS chainring, nor for a SS cog
thx all
icithecat
11-04-04, 08:49 PM
Yup. A 750cc racing motorbike generating 120hp uses alu for the rear cog (the big one) and heat treated steel for the front (the small one). These last approx 20,000 miles on a perfect chainline. I believe that a human generates 1/12th of an hp.
Don't believe for a second that skidding generates more force that whacking the throttle at 5,000 rpm.
I never used this but it looks interesting....
http://www.emachineshop.com/
I am 100% sure that a custom chainring would be prohibitively expensive. I don't even know if special heat treating would be required.
Nice thing about the emachineshop is that you get a quote upfront.
Yup. A 750cc racing motorbike generating 120hp uses alu for the rear cog (the big one) and heat treated steel for the front (the small one). These last approx 20,000 miles on a perfect chainline. I believe that a human generates 1/12th of an hp.
Don't believe for a second that skidding generates more force that whacking the throttle at 5,000 rpm.
They are a lot thicker - I've worn the teeth out of many a chainring/cog.
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