The 7309BMU Nachi Angular Contact Ball Bearing is designed for applications requiring both radial and axial load support. It features a 40-degree contact angle, a brass cage, and is flush ground for precision. The bearing has an inner diameter of 45 mm, an outer diameter of 100 mm, and a width of 25 mm. It is configured as a single row, open type, and is suitable for high-performance applications such as machine tools and hydraulic pumps. The bearing's specifications make it ideal for environments where precise shaft rotation and rigidity are essential.