Spherical roller bearings
Special designs

Besides the standard spherical roller bearing designs, RKB has developed new solutions according to specific application requirements. The special designs include: closed spherical roller bearings, for smooth operation in contaminated environments; ROVSX type, expressly designed for vibratory equipment; WOR execution, suitable for gear output shaft of truck concrete mixers; and split bearings to make maintenance operations easier at hard-to-reach positions. If duly applied, these special designs are cost effective for the customer, since they allow increased bearing life expectancy and reduced machine downtime.

Main types

  • Sealed type

    • Design used for medium and large size bearings operating at medium speeds
    • Inner ring with integral side ribs
    • Symmetrical roller profile
    • One-piece double pronged machined brass cage with integral slinger guided on the inner ring
    • Integral rubber seals on both bearing sides for harsh working conditions (2CZ)
    • Lubrication groove and holes in the outer ring
    • Available with plugged lubrication holes in the outer ring (W77)
    • Available with two-piece window type pressed steel cage guided on the inner ring
  • Split type SSRB

    • Design used for medium and large size bearings
    • Wider inner ring with integral side ribs
    • Symmetrical roller profile
    • Two-piece bolted double pronged machined brass cage guided on the inner ring
      Engineered for hard-to-reach positions (e.g. bucket wheel excavators)
    • Design for easy mounting, dismounting and maintenance to reduced machine downtime
    • Available in taylor-made dimension
  • Type WOR

    • Design used for gear output shaft of truck concrete mixers
    • Inner ring with integral central rib
    • Symmetrical or asymmetrical roller profile
    • Two-piece pressed steel window type cage guided on the inner ring
    • Wider outer ring (WOR) in one piece or split into two halves
    • Permissible misalignment greater than standard execution
    • Available with two-piece machined brass cage guided on the inner ring
  • Type ROVSX

    • Design used for vibratory equipment
    • Inner ring with integral side ribs
    • Symmetrical roller profile
    • Two-piece machined brass cage guided on the outer ring
    • Radial internal clearance higher than normal CN
    • Running accuracy higher than standard execution
    • Available with lubrication groove, three lubrication holes in the outer ring and six lubrication holes in the inner ring (W513)
    • Available both with cylindrical and tapered bore (K/K30 suffixes)
  • Type ECCS

    • Design used for small to medium size bearings
    • Ribless inner ring
    • Symmetrical roller profile
    • Two-piece pressed steel window type cage with slotted open face to improve lubricant flow and separated slinger guided on the inner ring
    • Lubrication groove and six holes in the outer ring (W33X)
    • Suitable for harsh environments
    • Available with lubrication groove, three lubrication holes in the outer ring and six lubrication holes in the inner ring (W513)