This tapered roller bearing carries combined radial and axial loads through its single row of tapered rollers running between inner and outer raceways set at an angle to the bearing axis. The 32309-A has a bore diameter of 45.0 mm, an outside diameter of 100.0 mm, and a net mass of 1.439 kg. Main dimensions follow DIN 720, and the design is separable, allowing the cone assembly to be mounted independently from the cup. The cage is of standard design, and the limiting speed is rated at 7300 1/min. Because the inner and outer rings can be fitted separately, mounting and internal clearance adjustment are simplified compared with non-separable designs. The tapered raceway geometry allows the bearing to take up axial thrust in one direction while simultaneously supporting radial load, so it is typically installed in pairs to react thrust from both directions. Running accuracy and load capacity depend on correct axial clearance setting during mounting, and lubrication should be selected to suit the operating speed relative to the stated limiting speed.