Exploring the Structure of Four-Row cylindrical Roller Bearings

Four rows CRB is   installed on roll neck with interference fit especially high rolling speed   mill. This bearing geometry allows to be used on bigger roll neck diameter   for same roll diameter. It has high radial load capability because of more   rollers filling. Four rows CRB only take radial force, so always going   together with DGBB or ACBB or radial/thrust TRB, the latter one take axial   load.

Shaft can move   axially again housing within certain limit. Four rows CRB offer couple   options considering application and maintenance. All options difference is   basically from inner ring and outer ring quantity, outer ring loose fit and   integrated rib quantity. Also cage geometry and roller quantity can be   different. 

FC, FCD and FCDP   four rows CRB are used for kind of heavy machinery like cold rolling mill and   hot rolling mill. Bearing ring and cage/roller assembly are separable which   is convenient for leaning, check and installation/removal.

FC：

Two outer ring have three integrated    ribs and   lubrication holes, one inner ring, both rollers guided two-claw brass cage.

FCD：

Two outer ring have three integrated ribs and        lubrication holes, two inner ring, both rollers guided two-claw brass cage.

FCDP：

two outer ring have one center rib, two loose fit   retainer ring,  one spacer, lubrication holes; two inner ring, both   rollers guided two-claw brass cage.