Manufacturers often use tapered roller bearings in certain assemblies because of what main reason?

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Tapered roller bearings are designed with a conical geometry that makes them capable of carrying axial (thrust) loads in a single direction, while also supporting radial loads. The contact between the tapered rollers and races converts part of the radial load into an axial load, giving the bearing a high thrust capacity in one direction. This unidirectional thrust resistance is why they’re chosen in assemblies where the main axial forces act in one direction, such as certain shafts that experience a consistent thrust direction from braking or torque. If thrust needed in the opposite direction, another bearing arrangement or a paired setup would be used. They aren’t chosen for being cheaper to manufacture, they don’t inherently handle radial loads better than other types, and they do require lubrication.