Suffixes P - S

PInjection moulded cage of glass fibre reinforced polyamide 66, rolling element centred
PA9Dimensional and running accuracy to ABMA tolerance class ABEC 9 (better than P4)
PA9AAs PA9
PA9BAs PA9 but running accuracy better than ABMA tolerance class ABEC 9
PHInjection moulded cage of glass fibre reinforced polyetheretherketone (PEEK), rolling element centred
PHAInjection moulded cage of glass fibre reinforced polyetheretherketone (PEEK), outer ring centred
PHASInjection moulded cage of glass fibre reinforced polyetheretherketone (PEEK), outer ring centred, lubrication grooves in the guiding surfaces
PPAcrylonitrile butadiene rubber contact seals at both sides of track runner bearing
PPAAxial slide rings of polyamide 66 at both sides of track runner bearing and improved profile of the runner surface
P4Dimensional and running accuracy to ISO tolerance class 4
P4ADimensional accuracy to ISO tolerance class 4 and running accuracy to ABMA tolerance class ABEC 9
P5Dimensional and running accuracy to ISO tolerance class 5
P6Dimensional and running accuracy to ISO tolerance class 6
P43P4 + C3
P52P5 + C2
P62P6 + C2
P63P6 + C3
QOptimized internal geometry and surface finish (tapered roller bearing)
QBCSet of four matched deep groove or angular contact ball bearings; two bearings arranged back-to-back with the other two arranged outside the back-to-back pair in tandem with them, i.e. two tandem pairs arranged back-to-back
QBTSet of four matched deep groove or angular contact ball bearings; two bearings arranged back-to-back and the other two in tandem at one side of the back-to-back pair, i.e. three bearings in tandem and back-to-back with fourth bearing
QFCSet of four matched deep groove or angular contact ball bearings; as /QBC but with central pair arranged face-to-face, i.e. two tandem pairs arranged face-to-face
QFTSet of four matched deep groove or angular contact ball bearings; as /QBT but with face-to-face pair at one side, i.e. three bearings in tandem and face-to-face with fourth bearing
QRSet of four single row deep groove ball or cylindrical roller bearing matched for equal distribution of radial load
QTSet of four matched deep groove or angular contact ball bearings arranged in tandem
R
  1. Integral external outer ring flange
  2. Crowned runner surface (track runner bearing)
RFRubberised flinger (pressed steel flinger with vulcanised rubber sealing lip) at one side of Y-bearing
2RFRF flinger at both sides of Y-bearing
RSContact seal of acrylonitrile-butadiene rubber (NRB) with or without sheet steel reinforcement on one side of the bearing
2RSRS contact seal on both sides of the bearing
RS1Sheet steel reinforced contact seal of acrylonitrile-butadiene rubber (NBR) 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
RS2Sheet steel reinforced contact seal of fluoro rubber (FKM) on one side of the bearing
2RS2RS2 contact seal on both sides of the bearing
RSHSheet steel reinforced contact seal of acrylonitrile-butadiene rubber (NBR) on one side of the bearing
2RSHRSH contact seal on both sides of the bearing
RSLSheet steel reinforced low-friction contact seal of acrylonitrile-butadiene rubber (NBR) on one side of the bearing
2RSLRSL low-friction contact seal on both sides of the bearing
RZSheet steel reinforced low-friction seal of acrylonitrile-butadiene rubber (NBR)
2RZRZ low-friction seal on both sides of the bearing
SMNeedle roller bearing with grease. The two-figure number following identifies the actual grease
SORTTolerance grade of needle rollers of a needle roller and cage assembly; the figures following give the actual limits in μm, e.g. /SORT-2-4
SPSpecial tolerance class for machine tool spindle bearings; dimensional accuracy approximately to ISO tolerance class 5 and running accuracy approximately to ISO tolerance class 4
S0Bearing rings or washers dimensionally stabilized for use at operating temperatures up to +150 °C
S1Bearing rings or washers dimensionally stabilized for use at operating temperatures up to +200 °C
S2Bearing rings or washers dimensionally stabilized for use at operating temperatures up to +250 °C
S3Bearing rings or washers dimensionally stabilized for use at operating temperatures up to +300 °C
S4Bearing rings or washers dimensionally stabilized for use at operating temperatures up to +350 °C