M
A Muzi wrote:
> RobCam wrote:
>
> > OK - So I don't have a grinder. Does anyone know of a place that will
> > do this for a fee? Seems like a good money making scheme for someone.
> > At $30+ for new chainring guards, a price of $20 per ring mod would be
> > great. Shipping wouldn't be much. Any takers?
> >
> Most chainrings are aluminum, not steel. Aluminum won't burn
> on a grindwheel and in fact trying that may be unsafe as
> aluminum or brass can load up on the wheel and cause
> catastrophic failure. (pieces of stone flying out from 1760
> rpm). I have never seen that happen but it's mentioned in
> two machining texts.
>
> If you want to trim a chainring, try a file. It shouldn't
> take long. I'll gladly file your teeth away for $20!!
>
> --
> Andrew Muzi
> www.yellowjersey.org
> Open every day since 1 April, 1971
> RobCam wrote:
>
> > OK - So I don't have a grinder. Does anyone know of a place that will
> > do this for a fee? Seems like a good money making scheme for someone.
> > At $30+ for new chainring guards, a price of $20 per ring mod would be
> > great. Shipping wouldn't be much. Any takers?
> >
> Most chainrings are aluminum, not steel. Aluminum won't burn
> on a grindwheel and in fact trying that may be unsafe as
> aluminum or brass can load up on the wheel and cause
> catastrophic failure. (pieces of stone flying out from 1760
> rpm). I have never seen that happen but it's mentioned in
> two machining texts.
>
> If you want to trim a chainring, try a file. It shouldn't
> take long. I'll gladly file your teeth away for $20!!
>
> --
> Andrew Muzi
> www.yellowjersey.org
> Open every day since 1 April, 1971