Four Point Contact B. FAG QJ209 -MPA-C3

The FAG QJ209 -MPA-C3 four-point bearing is an open rolling bearing with a 45 mm bore, an 85 mm outer diameter and a brass cage, designed for axial forces acting in both directions.

The FAG QJ209 -MPA-C3 four-point bearing belongs to the group of radial ball bearings with a split inner ring. Thanks to this specific design, the bearing accommodates axial forces in both directions whilst requiring minimal installation space in the radial direction. With dimensions of 45 x 85 x 19 mm, this open design is suitable for applications requiring precise axial guidance. The brass cage guides the rolling elements at operating temperatures ranging from –30 to +150 degrees Celsius.

In which applications does the QJ209 -MPA-C3 four-point bearing prove its worth?

The QJ209 -MPA-C3 four-point bearing is primarily used where high axial loads occur in alternating directions. This design often functions as a pure axial bearing in combination with separate radial bearings. Thanks to the split inner ring, the outer ring with ball cage and the two inner ring halves can be fitted separately, which simplifies handling during installation and maintenance work.

What does the C3 bearing clearance mean for the QJ209 -MPA-C3 four-point bearing?

The designation C3 indicates a slightly increased radial clearance compared with the standard version. This increased internal clearance compensates for operational temperature differences between the shaft and housing, as well as tight fits, without the bearing becoming stressed. As an open roller bearing without sealing washers and without a ring groove in the outer ring, this version is designed for use in oil- or grease-lubricated housings. It is manufactured to tolerance class P0 or ABEC 1.