Suffixes P - S

P
  1. Glass fibre reinforced polyamide 66 cage, rolling element centred
  2. Precision lock nuts made of sintered steel (For KMD 11 and KMD 12 lock nuts only)
P2
Dimensional and geometrical tolerances in accordance with P2 tolerance class
P4
Dimensional and geometrical tolerances in accordance with P4 tolerance class
P4A
Dimensional tolerance in accordance with ISO tolerance class 4, geometrical tolerance lower than ISO tolerance class 4
P4C
Dimensional tolerances approximately to ISO tolerance class 4, geometrical tolerances lower than ISO tolerance class 4 for radial bearings
P5
Dimensional and geometrical tolerances in accordance with P5 tolerance class
P6
Dimensional and geometrical tolerances in accordance with P6 tolerance class
P43
P4 + C3
P52
P5 + C2
P62
P6 + C2
P63
P6 + C3
P64
P6 + C4
P6CNR
P6 + CNR
PA
Glass fibre reinforced polyamide 66 cage, outer ring centred
PA9ADimensional and geometrical tolerances in accordance with ISO tolerance class 2
PBC
Set of five bearings arranged tandem back-to-back <<>>>
PBT
Set of five bearings arranged back-to-back and tandem <>>>>
PE
Enlarged diameter tolerance and axial run-out to P5 tolerance class for radial bearing
PEX
SKF Explorer bearing, used only when same-sized conventional and SKF Explorer bearings are available
PFC
Set of five bearings arranged tandem face-to-face >><<<
PFT
Set of five bearings arranged face-to-face and tandem ><<<<
PG
Set of five bearings for universal matching
PHGlass fibre reinforced polyetheretherketone (PEEK) cage, rolling element centred
PHA
  1. Glass fibre reinforced polyetheretherketone (PEEK) cage, outer ring centred
  2. Carbon fibre reinforced polyetheretherketone (PEEK) cage, outer ring centred (SuP)
PHASGlass fibre reinforced polyetheretherketone (PEEK) cage, outer ring centred, lubrication grooves in the guiding surface
PPATrack runner bearing with a PA66 axial sliding and sealing ring on both sides. Improved crowned profile of the outer ring running surface
PPSKA
KR design cam follower, sizes 16 and 19, with a PA66 axial sliding and sealing ring on both sides, improved crowned profile of the outer ring running surface and a hexagonal recess in the head of the stud, no relubrication features
PPXA
Cam followers with PPA features except for the outer ring running surface, which has a cylindrical profile
Q
  1. Optimized contact geometry and surface finish
  2. Polymer ball bearing with components made of glass
QBCSet of four bearings arranged tandem back-to-back <<>>
QBTSet of four bearings arranged back-to-back and tandem <>>>
QCL7C
Bearing with very tight geometrical tolerances and high preload capability
QFCSet of four bearings arranged tandem face-to-face >><<
QFTSet of four bearings arranged face-to-face and tandem ><<<
QRSet of four single row deep groove ball or cylindrical roller bearing matched for equal distribution of radial load
QTSet of four bearings arranged in tandem <<<<
R
  1. Flanged outer ring
  2. Polymer ball bearing with components made of borosilicate glass
RFContact seal made of acrylonitrile-butadiene rubber (NBR), additional rubberized flinger, on one sde of the bearing
2RFRF contact seal, on both sides of the bearing
RSContact seal made of acrylonitrile-butadiene rubber (NRB), on one side of the bearing
2RSRS contact seal, on both sides of the bearing
RS1Contact seal made of acrylonitrile-butadiene rubber (NRB), on one side of the bearing
2RS1RS1 contact seal, on both sides of the bearing
RS1ZSheet steel reinforced contact seal of acrylonitrile-butadiene rubber (NBR) on one side and one shield on the other side of the bearing
RS2Contact seal made of fluoro rubber (FKM), on one side of the bearing
2RS2RS2 contact seal, on both sides of the bearing
RS5
Contact seal made of hydrogenated acrylonitrile-butadiene rubber (HNBR), on one or both sides of the bearing
2RS5
RS5 contact seal, on both sides of the bearing
RSHContact seal made of acrylonitrile-butadiene rubber (NBR), on one side of the bearing
2RSHRSH contact seal, on both sides of the bearing
RSLLow-friction contact seal made of acrylonitrile-butadiene rubber (NBR), on one side of the bearing
2RSLRSL low-friction contact seal, on both sides of the bearing
RZLow-friction non-contact seal made of acrylonitrile-butadiene rubber (NBR), on one side of the bearing
2RZRZ low-friction non-contact seal, on both sides of the bearing
S
  1. Matched bearings for an equal load distribution. The number preceding indicates the number of bearings, e.g. NK 50/25 TN/2S
  2. Polymer ball bearing with components made of Stainless steel 1.4034
S0
Bearing heat stabilized for operating temperatures ≤ 150 °C (300 °F)
S1
Bearing heat stabilized for operating temperatures ≤ 200 °C (390 °F)
S2
Bearing heat stabilized for operating temperatures ≤ 250 °C (480 °F)
S3
Bearing heat stabilized for operating temperatures ≤ 300 °C (570 °F)
SB
SKF ConCentra ball bearing with shortened inner ring
SM..Special grease, two numbers following identify the grease
/SORT..Tolerance grade of needle rollers of a needle roller and cage assembly, the numbers following identify the actual limits in μm, e.g. /SORT-2-4
SPDimensional tolerances in accordance with ISO tolerance class 5, geometrical tolerances in accordance with ISO tolerance class 4
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