Double direction thrust ball bearings

Double direction thrust ball bearings consist of one shaft washer, two housing washers and two ball 

and cage thrust assemblies. The bearings are separable so that mounting is simple. The various parts can be 

mounted separately. The housing washers and ball and cage thrust assemblies are identical to those of the 

single direction bearings
.

Smaller bearings are available with either a flat seat surface on the housing washers or with a sphered seat 

surface.Bearings with sphered housing washers can be used together with sphered seat washers to compensate 

for misalignment between the housing and shaft. The sphered seat washers are available from RNB, but must be

ordered separately.

Double direction thrust ball bearings can accommodate axial loads acting in both directions and can 

thus serve to axially locate a shaft in both directions. They must not be subjected to radial load.

Thrust ball bearings, double direction:

Cages:

Depending on the bearing series and size, thrust ball bearings are fitted as standard with one of the 

following cages:

- a pressed steel cage, no designation suffix

- a one-piece machined brass cage, designation suffix M

- a one-piece machined steel cage, designation suffix F

- a two-piece machined brass cage, designation suffix M .

Supplementary designations

The designation suffixes used to identify certain features of SKF thrust ball bearings are explained in the

following.

F-    Machined steel cage, ball centred

JR-   Cage comprising two flat pressed steel washers, ball centred

M-     Machined brass cage, ball centred

P5-   Increased dimensional and running accuracy to ISO tolerance class 5

P6-   Increased dimensional and running accuracy to ISO tolerance class 6

TN9- Injection moulded cage of glass fibre reinforced polyamide 66, ball centred