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Bore diameter d 500 mm
Outside diameter D 720 mm
Total bearing width over outer rings C 530 mm
Total bearing width over inner rings B 530 mm
Raceway diameter inner ring Fw 568 mm (Interchangeable)
Outer ring shoulder diameter D1 ≈ 651 mm
Inner ring radius (chamfer) r1,2 min. 13x20° mm
Outer ring radius (chamfer) r3,4 min. 5 mm
Design variant/feature: BC4.10/WI Four-row cylindrical roller bearing

Calculation data
Basic dynamic load rating C 10800 kN
Basic static load rating Co 28500 kN
Fatigue load limit Pu 2120 kN
Bearing interchangeable parts
Outer ring Assembly: R314441 B
Inner ring (Bushing): L314441 B

Mass: 730 Kg

Four-row cylindrical roller bearing 314441B (500x720x530mm) is a very popular bearing for high-speed long rolling mill. Its outer ring assembly R314441B and inner sleeve L314441B (Bushing) are interchangeable parts. FV is a well-known manufacturer of rolling mill bearings.

FV brand Four cylindrical roller bearings

Four and six-row cylindrical roller bearings are used almost exclusively for the roll necks of rolling mill stands, calenders and roller presses. Their friction is low compared with other roller bsarings. As they are normally mounted with an interference fit on the roll neck, they are particularly suitable for rolling mill applications where the rolling speed is high.

The low bearing cross section allows for relatively large roll neck diameters in comparison with the roll diameter. Since very many rollers can be incorporated, the radial load carrying capacity is extremely high.

Four-row cylindrical roller bearings are only able to accommodate radial loads. They are therefore mounted together with deep groove or angular contact ball bearings, or with taper roller bearings, either radial or thrust designs, which take up the axial loads.

The four and six-row cylindrical roller bearings are of separable design, i.e. the ring or rings with integral flanges and the roller and cage assemblies can be mounted independently of the free rings, or all bearing components can be mounted separately. This considerably simplifies bearing mounting, maintenance and inspection. A certain limited axial displacement of the shaft with respect to the housing can be accommodated wrthin the bearing.

FV four-row cylindrical roller bearings have a cylindrical bore and some sizes are also available with tapered bore. Bearings with tapered bore can be adjusted during mounting to give a certain radial internal clearance or a defined preload.

Four-row cylindrical roller bearings with cylindrical bore

FV four-row cylindrical roller bearings with cylindrical bore are available in many designs dictated by the application or by maintenance considerations. The various designs differ basically in the number of inner and outer rings as well as in the number of loose or integral flanges on the outer ring. There are also differences in cage design and in the number of rollers per cage pocket.

For bearing arrangements (up to 8.107 m/s rolling speed) where the bearings are mounted with a loose rather than an interference fit on the roll neck, in order, for example, to enable rapid roll replacement in the chocks, FV four-row cyindrical roller bearings are supplied in special designs. To largely compensate for the disadvantages of the loose fit (the inner rings wander on the seating which can damage both bearing and seating), these bearings have a helical groove in the bore and/or lubrication grooves in the side faces of the bearing rings. These grooves enable the mating surfaces to be efficiently lubricated.

Bearings which have one or more of these features are identified in the bearing tables by the following letters

G: helical groove in bearing bore

W: lubrication grooves in side faces of bearing

Wl: lubrication grooves in side faces of inner ring

WO: lubrication grooves in side faces of outer ring

Tolerances and clearances: ISO standard, Perfect interchange

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