spindle to motor connection

At 12:47 PM 1/23/03 -0000, you wrote:

>There were a few machines that used flat belts (nowadays they'd be
>urethane, or some such). One pulley of the spindle motor pair has a
>width which just accomodates the belt, with flanges on both ends. It
>will also have a heavy crown in the center,which serves to keep the
>belt centered on IT. The other is a straight right cylinder, of a
>diameter to effect the desired ratio betweeen the two; and long
>enough to accomodate the desired spindle travel.

Not only have I seldom if ever seen flanged pulleys for flat belts, I have
never seen a flat belt pully that wasn't crowned. The crown is both
necessary and sufficient.


Regards, Hoyt McKagen


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