This single row cylindrical roller bearing carries two ribs on the outer ring and one rib on the inner ring, giving it a semi-locating function that allows axial displacement in one direction while guiding the shaft in the other. Bore diameter is 80.0 mm, outside diameter 170.0 mm, width 58.0 mm, and net mass 6.5 kg. The E design provides an optimized internal geometry for higher load carrying capacity, the cage is executed in M1 version, and the limiting speed reaches 7200 1/min with a reference speed of 3450 1/min. Radial internal clearance is C3, wider than standard, which compensates for thermal expansion and interference fits under load. The semi-locating design suits applications where the shaft needs to move axially in one direction while remaining radially guided, and the roller-rib contact geometry supports high radial loads at the given speed range. As an open bearing without integrated sealing, lubrication and contamination protection must be provided by the surrounding housing arrangement.