... Roller Bearings (TDO Double-Row Tapered Roller Bearings (TDO Type)This type of bearing is composed of a double cup, two cone ... cup has an oil slot and some oil holes.This type of bearing can carry both radial and axial loads, so ... , specialized and special” bearing products have been widely applied to aviation, spaceflight, navigation, machine tool, wind turbine generator, metallurgy, petroleum, ...