Frankfort Arsenal sent the O ring to repair my Universal seating die, it was attached to a new die set. Good people.
Mike

I need six new O rings for my surface grinder. When I took the motor off half were missing and the other half were worn so bad they all need to be replaced. Why they didn't use one simple precision V belt I don't know but they used six O rings.  Usually when I need O rings I go to the local hardware stower or the auto parts stower.  I might actually have to order these because they must be about eight inches in diameter and about a quarter of an inch in diameter and I'm not sure if they're made of some special rubber or what. 

I took the motor off because it stopped working and it wouldn't go no more. They fixed it at the electric motor stower in Idaho Falls. Cost me 58.00 dollars. It was the capacitor on the side of the motor.  Nothing lasts forever these days.