Four Point Contact B. SKF QJ326 N2MA/C3

The SKF QJ326 N2MA/C3 four-point bearing, measuring 130 × 280 × 58 mm, accommodates high axial forces in both directions and features retaining grooves in the outer ring.

The SKF QJ326 N2MA/C3 four-point bearing is a separable rolling bearing with a bore diameter of 130 mm, an outer diameter of 280 mm and a width of 58 mm. This design features a split inner ring, allowing the outer ring and ball assembly to be fitted separately from the inner ring halves. This open roller bearing primarily accommodates axial forces in both directions and requires only a small amount of axial installation space. Designed for operating temperatures ranging from -30 to +200 degrees, it complies with tolerance class P0/PN or ABEC 1.

When is the QJ326 N2MA/C3 four-point bearing used?

This four-point bearing is primarily used where varying or high axial loads occur with a limited bearing width. Typical applications can be found in industrial gearbox construction and in bearing arrangements where a separate radial bearing absorbs the transverse forces and the four-point bearing serves purely for axial guidance. Thanks to the split inner ring, the design accommodates a large number of rolling elements. As this is an unsealed bearing, the bearing assembly is integrated into the lubrication system of an enclosed housing.

What is the function of retaining grooves and C3 clearance?

Two retaining grooves in the outer ring, offset by 180 degrees, secure the component in the housing seat via locking pins. This is designed to prevent the outer ring from rotating with the shaft when subjected to an axial load. The version with C3 radial clearance provides additional radial clearance. This clearance serves to compensate for thermal expansion at operating temperatures of up to +200 degrees and to prevent the bearing from becoming stressed. The integrated brass cage guides the balls whilst maintaining dimensional stability and withstands mechanical stresses during operation.