The Nachi 5203-2NS is a double-row angular contact ball bearing featuring a 17 mm inner diameter, 40 mm outer diameter, and 17.5 mm width. It has a 20-degree contact angle and is sealed on both sides with double contact seals (2NS) to protect against contaminants. The bearing offers a dynamic load rating of 15,000 N and a static load rating of 9,250 N, supporting high-speed operation up to 12,000 rpm with grease lubrication and 17,000 rpm with oil. Its robust design includes a punching cage and is suitable for applications requiring durability and precision in compact dimensions.