The Nachi 5209ZZ is a double-row angular contact ball bearing featuring a 45mm bore diameter, 85mm outer diameter, and 30.2mm width. It has a pressed steel cage and double metal shields on both sides for protection against contaminants. The bearing supports a dynamic load rating of approximately 42,500 N and a static load rating near 34,500 N, with a contact angle of 20 degrees, making it suitable for high radial and axial loads. It operates efficiently within a temperature range of -20°C to +150°C and is manufactured from standard bearing steel, ensuring durability and precision in demanding applications.