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Cylindrical roller backing bearings

SKF backing bearings based on cylindrical roller bearings have two or three rows of rollers and are available as full complement bearings (without cage) or as caged bearings, with or without integral flanges or flange rings. The advantage of the bearings without flanges lies in their particularly simple geometrical form and their very high radial load carrying capacity.
Cylindrical roller backing bearings without flanges or flange rings cannot accommodate any axial load. It is therefore necessary to position thrust washers of bronze or plastic between the side faces of the outer ring and the support saddles (fig 1).
Thrust washers are not required with backing bearings with flanges (or flange rings) as the design of these bearings enables them to accommodate simultaneously acting radial and axial forces.
Cylindrical roller backing bearings are the most popular backing bearings. Consequently SKF produces many different designs which are listed below.
Backing bearings without axial guidance, without seals

BCZ.1 design

Double row cylindrical roller backing bearing with one integral flange on both inner and outer rings, cage-guided roller complement (fig 2).

BCZ.2 design

Double row cylindrical roller backing bearing with one integral flange on both inner and outer rings, cage-guided roller complement and annular lubrication groove in the inner ring bore (fig 3).

BCZ.3 design

Three-row full complement cylindrical roller backing bearing with flangeless outer ring and two loose flange rings on the inner ring (fig 4).

BCZ.4 design

Three-row full complement cylindrical roller backing bearing with flangeless outer ring and two loose flange rings on the inner ring and two annular lubrication grooves in the inner ring bore (fig 5).

BCZ.5 design

Three-row caged cylindrical roller backing bearing with flangeless outer ring and two loose flange rings on the inner ring, cage-guided roller complement (fig 6).

BCZ.6 design

Three-row caged cylindrical roller backing bearing with flangeless outer ring, two loose flange rings on the inner ring, cage-guided roller complement and two annular lubrication grooves in the inner ring bore (fig 7).

BCZ.7 design

Three-row caged cylindrical roller backing bearing with flangeless outer ring, two loose flange rings on the inner ring, inner ring guided roller complement and two annular lubrication grooves in the inner ring bore (fig 8).

BCZ.8 design

Three-row caged cylindrical roller backing bearing with two integral flanges in the outer ring, cage-guided roller complement and two annular lubrication grooves in the inner ring bore (fig 9).
Backing bearings with axial guidance without seals

BCZ.9 design

Double row caged cylindrical roller backing bearing with three integral flanges in the outer ring, two loose flange rings on the inner ring, cage-guided roller complement and annular lubrication groove in the inner ring bore (fig 10).

BCZ.10 design

Three-row full complement cylindrical roller backing bearing with two integral flanges in the outer ring and two loose flange rings and two loose guide rings on the inner ring (fig 11).

BCZ.11 design

Three-row caged cylindrical roller backing bearing with two integral flanges in the outer ring and two loose flange rings and two loose guide rings on the inner ring, cage-guided roller complement (fig 12).

BCZ.12 design

Three-row full complement cylindrical roller backing bearing with four integral flanges in the outer ring and loose flange rings on the inner ring (fig 13).

BCZ.13 design

Three-row caged cylindrical roller backing bearing with four integral flanges in the outer ring and loose flange rings on the inner ring, cage-guided roller complement (fig 14).
Sealed backing bearings with axial guidance

BCZ.14 design

Double row full complement cylindrical roller backing bearing with three integral flanges in the outer ring, two loose flange rings on the inner ring, radial shaft seals, no lubrication holes (fig 15).

BCZ.15 design

Double row caged cylindrical roller backing bearing with three integral flanges in the outer ring, one integral and one loose flange ring on the inner ring, cage-guided roller complement and radial shaft seals (fig 16).

BCZ.16 design

Double row caged cylindrical roller backing bearing with three integral flanges in the outer ring, two loose flange rings on the inner ring, cage-guided roller complement and "Fey-ring" seals (fig 17).

BCZ.17 design

Double row caged cylindrical roller backing bearing with three integral flanges in the outer ring, two loose flange rings on the inner ring, cage-guided roller complement and annular lubrication groove in the inner ring bore (fig 18).

BCZ.18 design

Three-row caged cylindrical roller backing bearing with two integral flanges in the outer ring, two loose flange rings on the inner ring which form a gap-type seal with the outer ring raceway, cage-guided roller complement (fig 19).

BCZ.19 design

Three-row full complement cylindrical roller backing bearing with two inserted flanges in the outer ring, which form a gap-type seal with the flanges on the inner ring (fig 20).

BCZ.20 design

Three-row caged cylindrical roller backing bearing with four integral flanges in the outer ring, one integral flange and one loose flange ring on the inner ring, cage-guided roller complement (fig 21).
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