SKF spherical roller bearings designation (nomenclature)

The designations of most SKF rolling bearings follow a system that may consist of a basic designation with or without one or more prefixes and/or suffixes: SKF bearing designation

An example and the applicable options for SKF spherical roller bearings are given below.

21315E

21315, see SKF bearing designation

SKF spherical roller bearings prefixes

  • BS2-: Bearing, designated by a drawing number
  • E2.: SKF Energy Efficient bearing 
  • ZE: Bearing with SensorMount feature 

SKF spherical roller bearings suffixes

Suffixes - Internal design

  • CA, CAC: Retaining flanges on the inner ring, guide ring centred on the inner ring, machined brass cage 
  • CC(J), CJ: Flangeless inner ring, guide ring centred on the inner ring, two stamped steel cages
  • CCJA, EJA: Flangeless inner ring, guide ring centred on the outer ring raceway, two stamped steel cages 
  • E: Optimized internal design for increased load carrying capacity 
    213, 222 and 223 series: Flangeless inner ring and two stamped steel cages. Annular groove and three lubrication holes in the outer ring.
    d ≤ 65 mm: Guide ring centred on the inner ring 
    d > 65 mm: Guide ring centred on the cage 

Suffixes - External design (seals, snap ring groove etc.)

  • -CS, 2CS: Contact seal, NBR, on one or both sides
  • -CS2, 2CS2: Contact seal, FKM, on one or both sides 
  • -CS5, 2CS5: Contact seal, HNBR, on one or both sides 
  • K: Tapered bore, taper 1:12
  • K30: Tapered bore, taper 1:30 

Suffixes - Cage design

  • F: Machined steel cage, inner ring centred 
  • FA: Machined steel cage, outer ring centred 
  • J: Stamped steel cage, inner ring centred 
  • JA: Stamped steel cage, outer ring centred 
  • MA: Machined brass cage, outer ring centred 

Suffixes - Materials, heat treatment

  • 235220: Case-hardened inner ring with a helical groove in the bore
  • HA3: Case-hardened inner ring 

Suffixes -Accuracy, clearance, preload, quiet running

  • C08: Running accuracy to P5 tolerance class
  • C083: C08 + C3 
  • C084: C08 + C4 
  • C2: Radial internal clearance smaller than Normal 
  • C3: Radial internal clearance greater than Normal 
  • C4: Radial internal clearance greater than C3 
  • C5: Radial internal clearance greater than C4 
  • P5: Dimensional and running accuracy to P5 tolerance class
  • P6: Dimensional and running accuracy to P6 tolerance class
  • P62: P6 + C2 

Suffixes - Lubrication

  • GEM9: Filled to 70 – 100% with SKF LGHB 2 grease
  • VT143: Filled to 25 – 45% with SKF LGEP 2 grease 
  • VT143B: Filled to 45 – 60% with SKF LGEP 2 grease 
  • VT143C: Filled to 70 – 100% with SKF LGEP 2 grease 
  • W64: Solid Oil 
  • W: Without annular groove and lubrication holes in the outer ring 
  • W20: Three lubrication holes in the outer ring 
  • W26: Six lubrication holes in the inner ring 
  • W33: Annular groove and three lubrication holes in the outer ring 
  • W33X: Annular groove and six lubrication holes in the outer ring 
  • W77: Plugged W33 lubrication holes 
  • W513: W26 + W33

Suffixes - Other variants

  • VA405: Bearing for vibratory applications, surface-hardened stamped steel cages 
  • VA406: Same as VA405, but PTFE coated cylindrical inner ring bore
  • VE552(E): Outer ring with three equally-spaced threaded holes in one side face to accommodate
    lifting tackle. The E indicates that appropriate eye bolts are supplied with the bearing. 
  • VE553(E):Same as VE552(E), but threaded holes in both side faces
  • VG114: Surface-hardened stamped steel cages 
  • VQ424: Running accuracy better than C08 

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