21308K Spherical roller bearing

21308K The 21308K is a spherical roller bearing with a 40 mm tapered bore (1:12 taper) from the 213 series. Spherical roller bearings feature two rows of barrel-shaped rollers running on a common spherical outer ring raceway, providing self-aligning capability to accommodate shaft deflection and misalignment. This bearing type is commonly used in heavy industrial applications including gearboxes, mining equipment, paper mills, crushers, and conveyor systems where shaft misalignment, heavy radial loads, and moderate thrust loads are present. The tapered bore facilitates direct mounting on tapered shafts or adapter sleeves for simplified installation and dismounting.