21309K Spherical roller bearing

21309K The 21309K is a spherical roller bearing from the 213 series with a 45 mm tapered bore (1:12 taper ratio). Spherical roller bearings feature barrel-shaped rollers running on a spherical outer ring raceway, providing self-aligning capability to accommodate shaft misalignment and deflection. These bearings are designed for heavy radial loads and moderate thrust loads in both directions. Common applications include industrial gearboxes, mining equipment, paper mills, and construction machinery where shaft deflection or mounting errors require self-alignment capability.