BEARINGS PRODUCTION RANGE

Multi row cylindrical roller bearings
RKB cylindrical roller bearings with four or six rows have low cross section, high load carrying capacity
and stiffness, and are particularly used for metal rolling equipment in mills, where the equipment has
been scaled down and jet loads remain high.
These bearings are only able to accommodate radial loads, therefore they are mounted together with
deep groove or angular contact ball bearings or with taper roller bearings which take up the axial
loads. The four-row cylindrical roller bearings are of separable design, which considerably simplifies
mounting, maintenance and inspection.
RKB cylindrical roller bearings can tolerate moderate to high shaft speeds. The rollers and outer races
are carefully matched to ensure the best load distribution.
Inner rings (designation L) are interchangeable with other assemblies (designation R). Moreover, RKB
multi row bearings allow direct interchange with main premium competitor products.
RKB has a flexible manufacturing program of different styles (also special) and sizes for multi row
bearings.
They have cylindrical bore and some sizes are also available with tapered bore as required by the
application or by maintenance request.
The use of multi row cylindrical roller bearings in metal rolling mills exposes them to very heavy stresses,
sometimes to impact loadings. The rings and rollers can be manufactured with very high quality case
hardened carburizing alloy steels. Deep case depth and special heat treatment ensure superior size
stability, fracture toughness and reliability.
Where the bearings are mounted with a loose fit on the roll neck, RKB multi row cylindrical roller bearings
have C2 internal radial clearance and are supplied with a helical groove in the bore and/or lubrication
grooves in the side faces of the bearing rings for the efficient lubrication of the mating parts (e.g. suffix
AC).
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