BEARINGS PRODUCTION RANGE

Double row taper roller bearings
RKB double row taper roller bearings can take up heavy loads and are stiff.
Suitable for combined radial and axial loads, they locate axially the shaft in both directions with the stated
axial end play (also defined as BEP - Bench End Play) or given preload.
The basic styles are two-row converging TDI configuration and two-row diverging TDO configuration.
Rings and rollers are made of high chrome through hardening steels or case hardened carburizing alloy
steels depending on the application.
Cages for RKB double row taper roller bearings are stamped pressed steel. A steel pin-type cage, which
allows a larger complement of rollers for higher capacity, is also available.
This style of bearing set simplifies design and reduces the danger of bearing clearance changes due to axial
shaft expansion.
It is important the definition of the proper internal play related to the application.
RKB bearings in TDI configuration have a double cone assembly and two single cups and they are generally
supplied with a cup spacer.
The cup spacer of each bearing is face ground after accurate measurement of the distance between
adjacent cup faces to obtain a predetermined internal play. Consequently, spacers or components may not
be interchanged. An annular groove and lubrication holes are included in the spacer. The contact angle
converges, so the use of these bearings will not appreciably increase the rigidity of the shaft mounting.
RKB also produces the taper roller steep contact angle TDIS version with higher thrust capacity (while the
radial one is reduced) than the TDI type, normally used as back-up thrust bearings in rolling mills.
These TDIS bearings have combination of face slots (e.g. N, N1, N2 etc.) and bore key-way for locking the
cone on the shaft.
Also helical groove in the bore and lubrication grooves in side faces of double cone and/or retention sleeve
with annular groove and lubrication holes can be provided.
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