Spherical roller bearing supplementary code, suffix used to identify certain characteristics of spherical roller bearing, including SKF spherical roller bearing open design, sealed spherical roller bearing, vibration machinery bearing:
C2: radial clearance is smaller than normal group
C3: radial clearance is larger than normal group
C4: radial clearance is greater than C3
C5: radial clearance is greater than C4
C08: rotation accuracy meets ISO tolerance level 5
C083: C08 + C3
C084: C08 + C4
2CS: NBR contact seal ring with steel frame on both sides of bearing.Outer ring with lubrication groove and three lubrication holes, and covered by a plastic belt.
2CS2: bearing with steel frame on both sides of the fluorine rubber (FPM) contact seal ring.Outer ring with lubrication groove and three lubrication holes, and covered by a plastic belt.
2CS5: HNBR contact seal with steel skeleton on both sides of bearing.Everything else is the same as 2CS2
HA3: inner ring of surface hardening
K: tapered hole, taper: 1:12
K30: tapered hole, taper: 1:30
P5: dimensional accuracy and rotation accuracy meet ISO tolerance level 5
P6: dimensional accuracy and rotation accuracy meet ISO tolerance grade 6
P62: P6 + C2
VA405: bearing for vibration machinery, cage with face hardening
VA406: VA405 and inner bore with PTFE coating
VE552 (E) : an outer ring with three average published threaded holes on one side to connect the lifting gear;E means the bearing is fitted with a ring bolt
VE553 (E) : same as VE552, but with threaded holes on both sides
VG114: face hardened stamping steel cage
VQ424: rotation accuracy is higher than C08
W: no lubrication groove and lubrication hole in the outer ring
W20: outer ring with three lubrication holes
W26: inner ring with six lubrication holes
W33: outer ring with lubrication groove and three lubrication holes
W64: bearings with solid oil
W77: same as W33, but with lubricating holes and plugs
W513: W26 + W33
235220: face hardened inner ring, inner hole with spiral groove.