The Nachi 7203B Angular Contact Ball Bearing features a 17 mm inner diameter, 40 mm outer diameter, and 12 mm width, designed with a 40-degree contact angle for enhanced thrust load capacity. It has a single row of balls with an open steel or brass cage, supporting radial, axial, and composite loads in one direction. This ABEC 1 precision bearing offers a dynamic load capacity of 11,300 N and a static load capacity of 6,300 N. It operates at maximum speeds of 14,000 RPM with grease lubrication and 19,000 RPM with oil, suitable for high-speed, precision applications such as machine tools and electric motors. The bearing is pre-lubricated with light oil and made from high-quality JIS SUJ2 steel for durability and low noise performance.