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Timken's TQOW bearings are akin to the TQO bearings. When the filler and/or fillet rings do not have slots for lubrication already, they are provided in the form of the bearing inner race. Ranging in sizes from 50.800 mm to 1499.872 mm or 2.0000 to 59.0501 inches for ID, and 83.337 mm to 2032.000 mm or 3.2810 inches to 80.0000 inches for OD, the TQOW bearings are different from TQO in terms of the lubrication slots that are present on each face of the cone faces. The design attributes include a pair of double cones, a double cup with a cone spacer, two single cups and cup spacers, hardened cones spacers to minimize face wear, and serial numbering to guarantee correct installation.