This single-row cylindrical roller bearing NJ308-E-XL-M1 has a bore of 40.0 mm, outside diameter of 90.0 mm, and width of 23.0 mm, with a net mass of 0.764 kg. The outer ring carries 2 ribs and the inner ring 1 rib, giving the NJ design its semi-locating function. It uses a solid brass cage (M1) and the E design for increased load carrying capacity, with a limiting speed of 14200 1/min and a reference speed of 7100 1/min. The semi-locating arrangement allows axial displacement in one direction while guiding the shaft in the other, making it suitable where one bearing position must absorb thermal expansion or shaft movement along its axis. Radial internal clearance is CN (Group N), matching standard fit conditions. As an open bearing without integrated sealing, it requires external sealing and lubrication provision suited to the application's speed and load, with the brass cage supporting stable roller guidance at higher rotational speeds.