This cylindrical roller bearing (81210-TV) carries axial loads in a single direction, built up from a shaft washer, housing washer, and a cage-guided roller and cage assembly (K874, GS, WS). Bore diameter is 50.0 mm, outside diameter 78.0 mm, height 22.0 mm, and net mass is 361.5 g. The TV cage is made of glass fibre reinforced plastic, guiding the rollers with low friction. Limiting speed is 4500 1/min, reference speed 1550 1/min. The separate design of the washers and roller-and-cage unit allows mounting with defined axial clearance and simplifies fitting on the shaft and in the housing. Being a single-direction axial cylindrical roller bearing, it takes up axial load in one direction only and requires a separate radial bearing to guide the shaft. The polymer cage reduces mass and heat generation at the given speed range, and the bearing needs to be supplied with grease or oil according to the operating speed and load to maintain the rated limiting and reference speed values.