Outer ring: The outer ring of a double-row tapered roller bearing is typically a single piece, with two tapered raceways on its inner surface for contact with the rolling elements.
Inner ring: The bearing consists of two inner rings, each with its own tapered raceway on its inner surface. These two inner rings can be installed and removed independently, facilitating maintenance and replacement.
Spacer ring: Located between the two inner rings, it maintains their relative position and can be adjusted to vary the bearing's clearance.
Rolling elements: Typically tapered rollers, their shape matches the raceways of the outer and inner rings, allowing them to roll on these raceways and withstand loads.
Cage: Used to evenly distribute the rolling elements between the inner and outer rings, preventing collision and friction, while also maintaining their correct position.