1. Product Overview 4T-42690/42620 (42690/42620) is heavy-duty inch standard single-row separable tapered roller bearing assembly, composed of inner cone 42690 and outer cup 42620. Overall dimensions: 77.788mm inner bore × 127mm outer diameter × 30.162mm total assembly width. This bearing is designed to carry ultra heavy radial load and unidirectional axial thrust load simultaneously. The separable cone and cup construction allows flexible preload adjustment during assembly