
Ding, Dong, Merrily on High with hammered dulcimer, harp, and bells

Can I use a self lubricated bearings sealed after 5 years of its manufacture?
I bought a door today and found that it was manufactured in June 2002.It is in its original packaging.
Spin it by hand. Does running smoothly? If yes, then by all means use it.
how its made ball bearings