FAG751213/522249-P6Axial Angular Contact Thrust Ball Bearing Single Direction 65x100x27 mm P6 ABEC 3

Product Description

What this part is

FAG 751213-A is a single-direction axial angular contact thrust ball bearing built to P6 accuracy, carried on FAG order number 522249 and catalogued together as 751213/522249-P6. Shaft washer bore 65 mm, housing washer outside diameter 100 mm, total height 27 mm. It comprises one shaft washer, one housing washer and a single ball and cage assembly.

Decoding the designation

The 7512 prefix is the FAG axial angular contact thrust series and 13 is the bore code, which multiplied by five gives the 65 mm shaft washer bore. The A suffix marks the internal design version. 522249 is the FAG order number for this article, printed alongside the type designation on the carton, and P6 is the tolerance class, equivalent to ABEC 3.

What these specs mean in practice

An axial angular contact thrust bearing carries axial load in one direction through an oblique ball-to-raceway contact, which gives it more axial stiffness and a higher speed capability than a flat-seat thrust washer bearing of the same envelope. The P6 class tightens the height tolerance and the axial runout of the assembled bearing, which is what makes the series usable on machine tool spindles and screw drives where axial position has to repeat.

Load direction and stacking

Axial load is taken in one direction, through the housing washer and out through the shaft washer. Two bearings of the same designation mounted back to back locate a shaft axially in both directions, and bearings mounted in tandem share a single-direction load across two ball complements.

Quantity and configuration

One bearing, comprising the shaft washer, the housing washer and the ball and cage assembly as a matched set.

Fitting notes

The washers are separable, and the two seats are distinguished by bore: the shaft washer seats on the 65 mm shaft, the housing washer against the 100 mm housing bore shoulder. Both washer seating faces are flat and want a square, clean abutment, since a thrust bearing transmits its whole load through those faces. Assembly proceeds with the ball and cage assembly between the two washers and light lubrication before the axial preload is set.

Interchange guidance

The FAG and SKF 51213 single-direction thrust ball bearing shares the same 65 x 100 x 27 mm envelope, but it is a flat-seat thrust ball bearing in normal tolerance class, so it is a related size rather than a substitution. Double-direction 522-series thrust bearings for a 65 mm shaft are taller and carry their own designations.