Suffixes D - F

D
  1. Deviating or modified internal design with same boundary dimensions; as a rule the significance of the letter is bound to the particular bearing series

    Examples:
    • 3310 D Double row angular contact ball bearing with a two-piece inner ring
    • K 40×45×17 D Split needle roller and cage assembly (radial)
  2. Polymer ball bearings with a component made of Ceramic ZrO2
DA
Modified snap ring grooves in the outer ring; two-piece inner ring held together by a retaining ring
DBTwo bearings matched for mounting back-to-back. A number immediately following the DB identifies the design of the ring spacers. <>
DFTwo bearings matched for mounting face-to-face. A number immediately following the DF identifies the design of the ring spacer. ><
DG
Set of two bearings for universal matching
DRTwo bearings matched to one set
DS
  1. Single direction thrust bearing with two shaft washers
  2. Split radial needle roller and cage assembly
DTTwo bearings matched for mounting in tandem. A number immediately following the DT identifies the design of the ring spacers. <<
E
  1. Deviating or modified internal design with same boundary dimensions; as a rule the significance of the letter is bound to the particular bearing series; usually indicates reinforced rolling element complement
  2. Adapter sleeve without key slot, with a KMFE lock nut or standard adapter sleeve with a HME lock nut
ECOptimized internal design incorporating more and/or larger rollers and with modified roller end/flange contact
ECACA design spherical roller bearing with reinforced roller set
ECACCAC design spherical roller bearing with reinforced roller set
EGS
Inner ring with a non-directionally ground raceway
EH
Adapter sleeve without key slot, with a KMFE .. H lock nut
EJA
Flangeless inner ring, guide ring centred on the outer ring raceway, two stamped steel cages
EL
Adapter sleeve without key slot, with a KMFE .. L lock nut
F
  1. Machined steel or special cast iron cage, rolling element centred
F1
Grease fill 10–15% of the free space in the bearing
F3
Machined cage of spheroidal cast iron, shaft washer centred
FAMachined steel or special cast iron cage, outer ring centred
FB
  1. Machined steel or special cast iron cage, inner ring centred
  2. Single row angular contact ball bearing, high-speed B design, 18° contact angle
FE
Single row angular contact ball bearing, high-speed E design, 18° contact angle
2FContact seal made of acrylonitrile-butadiene rubber (NBR), additional plain flinger, on both sides
SKF logo