Craft's triple-labyrinth seals, unlike felt or lip type seals, rotate with the shaft eliminating and chance of shaft wear caused by the seal. Craft does this by utilizing a double O-Ring bore that grasps the shaft, forming a 100% seal along the shaft. The O-Rings are retained in the bore of the seal with a dovetail groove cut. The combination of the double O-Ring bore and the tighter tolerance between the seal and the cartridge at the labyrinth gives the Craft Pillow Block a far superior seal. Custom or external seal carriers can be supplied for special applications. Standard O-Ring material is Buna N, with other material available on request. Like all the other component parts of the bearing, the seals are also split down to the shaft and can easily be replaced without removing the shaft.

 


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