Patent ID: 7380431

Claim:
An oil film bearing for a rolling mill roll having a tapered neck leading to a reduced diameter end section, said bearing comprising: an internally tapered sleeve received in a seated position on said tapered neck, said sleeve being journaled for rotation in a bushing fixed within a chock assembly; a tubular piston received on and fixed relative to said end section; a cylinder internally subdivided by said piston into first and second chambers; a sleeve ring abutting an end of said sleeve; a circular thrust component interposed between and arranged to overlap adjacent segments of said sleeve ring and said cylinder and means for alternatively pressurizing one or the other of said first and second chambers, whereupon pressurization of said first chamber will cause said cylinder to axially advance and act via said thrust component and said sleeve ring to urge said sleeve into its seated position, and pressurization of said second chamber will cause said cylinder to axially retract and act via said chock assembly and said bushing to withdraw said sleeve from its seated position.