Larudee's mystery - Was: Ditch the bushings

[larudee@pacbell.net]

Ron N,

Are you talking about wire diameter or pin diameter?  I don't recall Ron O
talking about wire diameter and it sounds like pin diameter fits what you're
trying to say.

Paul Larudee

Ron Nossaman wrote:

> >>The part that counts is the radius at the point of string contact.
> >
> >Sure, but its the relative holding power of the friction between the
> >pin and the block, and its torque resistance as compared to the
> >actual torque developed by the string tension with a given size pin,
> >which will determine the pin holding ability.
> >
> >As Ron N wrote:
> >
> >>  . . . With the moment arm of the string torque being the radius of
> >>pin diameter
> >
> >(plus the radius of the core wire)
> >
> >>and the block contact surface area varying with the circumference
> >>(pi*D), doesn't this
> >>  proportion scale?
> >
> >Sure does!
>
> Hi gang,
> So far so good, until Ron O mentioned the wire diameter. That changes the
> ratio between the string leverage moment arm and pin circumference, and
> that doesn't scale. Given wire diameter, the torsional friction resistance
> to the string would increase with larger pin size. Smaller pins, less
> holding power. It's a small difference, and probably not of any practical
> concern, but there is a difference.
>
> Ron N