QJ206MA - SKF Four Point Contact Bearings - 30x62x16mm NU326ECJ/C3SKF This GE15GS 2RS bearing is

This GE15GS 2RS bearing is a metric steel/steel spherical plain bearing with a rubber seal on both sides of the bearing and a standard radial internal clearance

This 3309B-2ZTNC3 bearing is a metric double row angular contact bearing with a metal shield on both sides of the bearing

GE 57 ZO 2RS Metric radial spherical plain bearing 57mm - Bore Size Model Code Contact seal made of acrylonitrile-butadiene rubber (NRB)

The bearing's dimensions are 50mm Shaft Diameter

QJ206MA - SKF Four Point Contact Bearings - 30x62x16mm NU326ECJ/C3SKF This GE15GS 2RS bearing isThis QJ206MA bearing is a a four point contact bearings with a machined brass cage with the outer ring centred and a normal internal clearance. The bearing's dimensions are 30x62x16. QJ2 06 MA QJ 2 Series Four Point Contact Bearing 30mm Bore Size No Locating Slots Machined Brass Cage, Outer Ring Centred Normal Axial Internal Clearance