Four Point Contact B. FAG QJ226 -N2-MPA

FAG QJ226 -N2-MPA four-point bearing with a 130 mm bore, brass cage and split inner ring for axial guidance on both sides.

The FAG QJ226 -N2-MPA four-point bearing is a single-row radial ball bearing whose raceways are specially designed to accommodate axial forces in both directions. With key dimensions of a 130 mm bore, 230 mm outer diameter and 40 mm width, this rolling bearing requires less installation space in the axial direction than double-row designs. The open bearing features standard radial clearance and a tolerance class of P0/PN or ABEC 1, and is suitable for operating temperatures ranging from -30 to +150 degrees.

What is the QJ226 -N2-MPA four-point bearing suitable for?

Design engineers primarily use this four-point bearing where predominantly axial forces need to be transmitted within limited axial installation space. Typical applications are found in industrial drives with varying load directions. The bearing often functions purely as an axial bearing in combination with a separate radial bearing. Thanks to the split inner ring, the design accommodates a large number of balls. This contributes to stable axial guidance under varying load directions during operation.

What is the function of the retaining grooves and the split inner ring?

The design is characterised by two retaining grooves in the outer ring, offset by 180 degrees, and a split inner ring. The grooves serve to secure the outer ring against unwanted rotation within the housing using retaining pins. This proves useful when the bearing is mounted with radial clearance. Due to the split inner ring design, the bearing is not self-retaining. This facilitates installation, as the outer ring, together with the ball cage and the inner ring halves, can be fitted separately. The guided brass cage ensures the smooth running of the rolling elements.