FAGDouble Direction Axial Angular Contact Ball Bearing 140x210x84 mm 60 Degree SP Precision Brass Cage

Product Description

What this part is

A FAG 234428-M-SP double-direction axial angular contact ball bearing. Bore 140 mm, outside diameter 210 mm, overall width 84 mm. Two rows of balls at a 60° contact angle, machined brass cage, SP precision grade.

Component scope

Supplied without the inner race.

Decoding the designation

2344 denotes the FAG double-direction axial angular contact ball bearing series for screw drives, at a 60° contact angle. 28 denotes the bore code, a 140 mm bore. M denotes a machined brass cage. SP denotes the FAG special precision grade.

What these specs mean in practice

A 60° contact angle puts almost the whole load path along the axis, so this family is built for axial stiffness rather than radial capacity, which is why it is used to locate ball screws and machine tool spindles. The two ball rows face opposite directions, so the bearing takes thrust both ways and sets axial position without a second bearing. The split inner ring is what allows the steep contact angle to be assembled at all.

Published specifications

Bore: 140 mm. Outside diameter: 210 mm. Overall width: 84 mm. Contact angle: 60°. Number of rows: 2, opposed. Direction of thrust: double, both directions. Cage material: machined brass. Precision: SP grade. Rolling elements: steel balls.

Quantity and configuration

1 Pc, without the inner race.

Fitting notes

The outer ring clamps into the housing against a square face and the split inner ring halves clamp on the screw or spindle shoulder, with the clamping force setting the preload built into the ground faces.

Interchange guidance

The FAG family designation is 234428-M-SP. A 234428-UP is the same envelope at a finer precision grade, and a 7602-series or BSB-series ball screw support bearing shares the 60° contact angle but not the envelope or the double-direction construction; those are related sizes rather than interchanges.