This cylindrical roller bearing separates radial load carrying from axial positioning: the outer ring has two ribs, the inner ring is rib-free (smooth), so the inner ring can shift axially relative to the outer ring, making it a non-locating bearing, single row, type NU. Bore diameter is 50.0 mm, outside diameter 80.0 mm, width 16.0 mm, net mass 305.0 g. The roller set runs in an M1 cage. Limiting speed is 17300 1/min, reference speed 7400 1/min. Radial internal clearance is CN (Group N), and running accuracy is class P6, which suits applications requiring tighter rotational precision than standard tolerance. The axial displacement capability between rings allows this bearing to compensate for shaft thermal expansion or length tolerances on the non-locating side of a shaft arrangement, while the smooth inner ring reduces friction during that axial movement.