NU209 is a single - row cylindrical roller bearing with a bore diameter of 45mm, an outer diameter of 85mm, and a width of 19mm. It is made of high - carbon chromium bearing steel. The outer ring has double flanges, and the inner ring has no flanges. It has a separable design and can withstand high radial loads and bidirectional axial displacements. The maximum speed (oil - lubricated) is 9500r/min. It is suitable for a variety of industrial equipment.