Axial Deep Groove Ball B. FAG 51209

The 51209 axial deep-groove ball bearing from FAG Wälzlager, with dimensions of 45x73x20 mm, accommodates single-direction axial forces within a temperature range of -30 to +150 degrees.

The 51209 axial deep-groove ball bearing from FAG Wälzlager is designed as a single-direction bearing for purely axial loads. With a 45 mm bore, an outer diameter of 73 mm and a height of 20 mm, the bearing supports shafts axially in one direction. Manufactured from standard rolling-element bearing steel (100Cr6) and fitted with a robust sheet steel cage, this model complies with the standardised tolerance class P0/PN or ABEC 1.

What is the 51209 axial deep groove ball bearing suitable for?

The 51209 axial deep-groove ball bearing supports shafts on one side under high axial forces; however, due to its design, it must not be subjected to radial loads. It is used in bearing arrangements where axial forces act in one direction and radial loads are absorbed by separate radial bearings.

As it is manufactured from hardened 100Cr6 rolling bearing steel, the assembly can withstand high compressive stresses. The operating temperature range of –30 to +150 degrees allows it to be used in demanding industrial environments.

What should be taken into account when fitting the single-acting axial bearing?

During assembly, it is essential to distinguish precisely between the shaft washer with a fixed fit and the housing washer. As the 51209 version is not angle-adjustable and is supplied without a shim, the contact surfaces on the shaft and housing must be aligned exactly at right angles to the bearing axis.

Misalignment in rigid bearings leads to edge running and uneven load distribution. The guided sheet steel cage keeps the rolling elements spaced apart and contributes to low-friction operation. The lubricant must be selected to suit operating temperatures of up to +150 degrees.