Four Point Contact B. FAG QJ326 -N2-MPA

The FAG QJ326 -N2-MPA four-point bearing, measuring 130 × 280 × 58 mm, accommodates high axial forces in both directions whilst saving space.

The QJ326 -N2-MPA four-point bearing is a single-row radial ball bearing with a split inner ring, designed specifically for alternating or purely axial loads. Thanks to the steep contact angle, the design transmits considerable forces whilst maintaining a compact profile. The manufacturer, FAG, fits this version with a robust brass cage. As an open bearing, the bearing assembly can be flexibly integrated into existing lubrication systems and operates within a temperature range of -30 to +200 degrees.

What is the QJ326 -N2-MPA four-point bearing suitable for in operation?

This design is primarily used where axial forces occur in both directions and there is insufficient installation space for two separate angular contact ball bearings. This design is often used purely as an axial bearing, combined with a separate radial bearing. A prerequisite for this is radial clearance in the housing seat, to ensure that no impermissible radial forces act on the rolling elements. Typical applications include bearing arrangements subject to high axial loads and with limited axial installation space.

What are the advantages of the split inner ring and the retaining grooves?

The split inner ring allows a large number of balls to be accommodated and makes it considerably easier to install the outer ring, cage and inner ring halves separately. In the case of the N2 suffix, the outer ring has two retaining grooves offset by 180 degrees. Keyways or pins on the housing side engage with these grooves. They counteract unwanted rotation of the outer ring within the housing, particularly in radially unsupported bearing arrangements. The bearings are manufactured to tolerance class P0/PN or ABEC 1 with standard radial clearance.