In article <
5357a3bb-6ac6-4ac2...@googlegroups.com>,
>> >I've exhausted pretty much every avenue to find the belt I need to to ge=
>t t=3D
>> >his old friend back working. There is a V belt that drives the shutter a=
>nd =3D
>> >mechanism. Standard replacements haven't worked because there is such a =
>tig=3D
>> >ht diameter on the motor. There are fractional 1/4 inch v belts availabl=
>e t=3D
>> >hat fit the pulleys, but they can not make the tight turn around the mot=
>or =3D
>> >shaft. They just slip and stutter.. Any thoughts??
>>=20
>> Are you sure that's a V-belt and not an O-ring belt? Have you looked in
>> the PRB book yet?
>>=20
>> And, of course... has the shutter been lubricated properly and is the pad
>> for the pull-down cam totally, totally saturated and oil all over the cam=
>?
>> If the mechanism is stiff, the belt will slip.
>
>I guess at this point I'm not really sure. The mechanism has a belt tension=
>er which wouldn't be necessary with an o-ring. And..If the tensioner isn't =
>pulling the belt tight around the motor shaft, the tensioner hits the shutt=
>er blades. The pulleys are V shaped for an appx 1/4 inch wide belt. Gates m=
>akes fractional horsepower V belts, but they are too stiff, and wont make t=
>he tight diameter turn around the motor drive. The photos I have of the mac=
>hine with the back opened sure looks like a V belt. It must have been a ver=
>y flexible one. Im starting to think of possibly of a poly re enforced sewi=
>ng machine type belt. BTW, the entire drive train including shutter has bee=
>n rebuilt, smooth as silk. This thing has an oil pump that floods the shutt=
>er cam.
The PRB book says the F-16 machines get one each OC13.6 and OC15.6, which are
both long O-ring belts.
They do have listed a model 1000-R/S which gets an OO13.6 and an OO15.6,
but those are also O-ring belts.
You could order from Russell Industries directly if you don't have a local
source. You could also talk to the folks at Cardinal Sound and Motion
Picture in Maryland, I know they fix a lot of the bigger 16mm Elmo theatre
projectors.