An apparatus for transmitting vacuum to a device mounted on a rotating shaft comprising: first and second annular bearings mounted to the shaft so that there is a space between the bearings, wherein each bearing has an inner race and an outer race that sandwich a plurality of rollers and at least one seal between the inner and outer races; a seal between the inner race of each bearing and the shaft; a housing having a housing wall formed with a through hole, said housing wall together with said bearings forming a cavity that surrounds the shaft and communicates with said through hole; a seal between the housing wall and the outer race of each bearing; wherein said shaft is formed with an internal channel having a first aperture that communicates with said cavity and a second aperture communicating with said device.
