SKF QJ 209 MA Four-Point Contact Ball Bearing

SKF QJ 209 MA Four-Point Contact Ball Bearing has a 45 mm bore and uses a four-point contact geometry, with four rolling-contact points between the balls and races. This arrangement distributes loads across multiple interfaces, enabling support for radial and axial loads in both directions within a compact form factor, which supports stable rotation under mixed loading. As part of SKF’s QJ family, the bearing is designed for precision performance in compact assemblies where space is critical and load direction may vary. The 45 mm bore specifies the shaft size compatibility and guides the selection of matching housings and mating components designed for this diameter, helping ensure a reliable fit in suitable equipment.