This bearing carries axial loads acting in one direction only, transmitting them between a shaft washer and a housing washer separated by a ball and cage assembly. The 51208 has a height of 19.0 mm and a mass of 0.268 kg, with a steel sheet metal cage (JP). Limiting speed is 5500 1/min and reference speed 6900 1/min. Being a single-direction design, it must be mounted so that axial force is applied consistently from one side, as it cannot support load from the opposite direction or carry radial load. The separate washer construction allows for straightforward mounting and disassembly. Equivalent designations for this design and size are SKF 51208, NSK 51208, and NTN 51208.