This spherical roller bearing accommodates radial loads along with misalignment between shaft and housing, using the self-aligning design of the 231..-E1A series. Bore diameter is 140.0 mm, outside diameter 225.0 mm, and width 68.0 mm, with a net mass of 10.23 kg. The limiting speed is rated at 3000.0 1/min, with a reference speed of 1930.0 1/min. Main dimensions follow DIN 635-2, and the design code E1A indicates the standard profile for this series. The C3 radial internal clearance allows for thermal expansion and shaft deflection during operation, making it suitable for applications where some misalignment is expected during assembly or running conditions. The M cage, typically a machined brass cage, supports stability at the stated speed ratings. Bore type Z should be checked against the shaft fit drawing for correct mounting. Standard relubrication feature indicates the bearing accepts grease replenishment through conventional means. Dimensionally and constructionally, this bearing corresponds to NSK 23128CAME4C3, NSK 23128CAME4C3S11, RHP 23128EMW33C3, and SKF 23128CC/C3W33.