This spherical roller bearing compensates angular misalignment between shaft and housing through its two rows of barrel-shaped rollers running on a common sphered raceway in the outer ring. The tapered bore with K taper (1:12) allows mounting directly on a tapered shaft seat or with the use of an adapter or withdrawal sleeve, giving controlled interference fit during installation. Bore diameter is 190.0 mm, outside diameter 320.0 mm, width 104.0 mm, netto mass 32.723 kg. Limiting speed is rated at 2070.0 1/min, reference speed at 1260.0 1/min. The design is E1A, machined brass cage marked M. Radial internal clearance is CN (Group N), suitable for standard fit conditions without additional clearance adjustment at mounting. The tapered bore simplifies radial clearance control during fitting, as axial displacement on the taper directly reduces clearance to the target value. Relubrication is of standard type, allowing grease replenishment during service without bearing disassembly. Dimensionally and constructionally interchangeable with NSK 23138CAMKE4, NSK 23138CKE4, NSK 23138CKE4S11, NTN 23138BK, NTN 23138K, RHP 23138EKJW33, SKF 23138CCK/W33, SKF 23138CCKY/W33, SKF 23138CK.