This deep groove ball bearing carries radial loads at a bore of 140.0 mm, outside diameter of 175.0 mm and width of 18.0 mm, giving a thin-section cross-section relative to its diameter. It weighs 0.863 kg, runs with a JN steel sheet metal cage, and is rated for a limiting speed of 4350.0 1/min and a reference speed of 3350.0 1/min. The 2RZ suffix indicates non-contact shields on both sides, and the internal clearance falls in the CN (Group N) range. The thin-section design suits installations where radial space is limited but shaft diameter is large, while the shield configuration keeps out coarse contamination without adding contact friction, making relubrication through the shields possible when required. With standard CN clearance, the bearing is set for normal running conditions without preload, and the steel cage supports the stated speed limits under correct alignment and mounting practice.