Four Point Contact B. FAG QJ211 -MPA

The QJ211-MPA four-point bearing from FAG Wälzlager, with a 55 mm bore and a split inner ring, offers a compact solution for axial forces acting in both directions.

The QJ211-MPA four-point bearing from FAG Rolling Bearings is a single-row angular contact ball bearing whose raceways accommodate axial forces acting in both directions whilst maintaining a narrow bearing width. With key dimensions of a 55 mm bore, 100 mm outer diameter and 21 mm width, this rolling bearing requires little axial installation space. Designed as an open bearing without a seal, it operates in oil- or grease-lubricated systems. The built-in brass cage guides the rolling elements within the specified temperature range of –30 to +150 degrees Celsius.

What loads does the QJ211-MPA four-point bearing accommodate?

This four-point bearing primarily accommodates axial loads in both directions. It is frequently used in gearboxes or powertrains as an axial bearing in combination with a separate radial bearing. Thanks to the split inner ring, the design accommodates a large number of rolling elements, which enhances the axial load-carrying capacity. This design is unsuitable for predominantly radial loads, as this results in increased friction. The bearing is specifically used where alternating axial forces act within a confined installation space.

What distinguishes the split inner ring in the QJ211-MPA?

The split inner ring allows for the accommodation of more rolling elements than in non-split bearings. Furthermore, this means the bearing is not self-retaining. The outer ring with ball race and the two inner ring halves can be fitted separately, which facilitates installation in housings and on shafts. As this model is manufactured without a retaining groove in the outer ring, axial fixation is achieved via suitable bearing seats. A continuous supply of lubricant is required, as this open rolling bearing has no integrated seals.