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Open Spherical Roller Bearing

Open Spherical Roller Bearing

SKF spherical roller bearings are produced in several designs, depending on bearing series and size. The differences are

  • the arrangement of the floating guide ring as well as
  • the design of the inner ring and/or cages,

as described in the following.

  • C(J), CC
  • Two window-type steel cages, flangeless inner ring and guide ring centred on the inner ring (fig).

  • EC(J), ECC(J)
  • Two window-type steel cages, flangeless inner ring, guide ring centred on the inner ring and reinforced roller complement (fig).

  • CA
  • One-piece machined brass cage, double-pronged, retaining flanges on the inner ring and guide ring centred on the inner ring (fig).

  • CAF
  • As CA, but with a steel cage.

  • ECA, ECAC
  • Reinforced roller complement, one-piece machined brass cage, double-pronged, retaining flanges on the inner ring, guide ring centred on the inner ring (fig).

  • ECAF
  • As ECA, but with a steel cage.

  • E
  • For bearings with a bore diameter d = 65 mm:

    Two pressed window-type steel cages, flangeless inner ring and guide ring centred on the inner ring (fig).

  • For bearings with a bore diameter d > 65 mm:
  • Two pressed window-type steel cages, flangeless inner ring and guide ring centred on the cages (fig).

  • CAFA
  • One-piece machined steel cage, double-pronged, centred on the outer ring raceway, retaining flanges on the inner ring and guide ring centred on the inner ring (fig).

  • CAMA
  • As CAFA, but with a brass cage (fig).

With some exceptions, all SKF spherical roller bearings are produced with a cylindrical bore as well as with a tapered bore. The tapered bore of bearings in the

  • 240, 241, 248 and 249 series have a taper of 1:30, designation suffix K30, and the
  • other series have a taper of 1:12, designation suffix K.

Annular groove and lubrication holes

To facilitate efficient bearing lubrication, SKF spherical roller bearings are provided with

  • an annular groove and three lubrication holes in the outer ring (fig), designation suffix W33, or
  • three lubrication holes in the outer ring (fig), designation suffix W20.

E-design spherical roller bearings have the annular groove and three lubrication holes feature as standard so that the designation suffix W33 is omitted from the bearing designation.


Spherical roller bearings | Open bearings | Sealed bearings | Bearings for vibratory applications | SKF Energy Efficient (E2) spherical roller bearings | Split spherical roller bearings