Four Point Contact B. FAG QJ219 -N2-MPA

The QJ219 -N2-MPA four-point bearing from FAG Wälzlager, measuring 95 × 170 × 32 mm, accommodates high axial loads in both directions whilst maintaining a compact design.

The QJ219 -N2-MPA four-point bearing is a single-row radial ball bearing designed to accommodate axial forces from both directions. This open bearing from FAG Wälzlager has a bore of 95 mm, an outer diameter of 170 mm and a width of 32 mm. Thanks to its standard radial clearance and tolerance class P0 (ABEC 1), this rolling bearing is suitable for specific industrial applications. The component is designed for an operating temperature range of -30 to +150 degrees.

What is the QJ219 -N2-MPA four-point bearing suitable for in operation?

Design engineers prefer to use this four-point bearing where predominantly axial loads occur in varying directions and the axial installation space is limited. The design is often used in combination with a separate radial bearing as a pure axial bearing, with the outer ring mounted with radial clearance. Typical applications include bearing arrangements where space-saving guidance of axial forces is required.

What role do retaining grooves and the split inner ring play?

This design features two retaining grooves in the outer ring, offset by 180 degrees, through which retaining pins help prevent the outer ring from rotating within the housing. In addition, the split inner ring simplifies assembly of the unit, as the outer ring with ball races and the inner ring halves can be fitted separately. The brass cage guides the rolling elements at varying speeds. As an open bearing, this variant requires external sealing as well as a suitable lubricant supply.