Spherical Roller Bearing

Spherical Roller Bearing

Spherical roller bearings feature two rows of symmetrical rollers that allow for self-alignment.

They are engineered to handle heavy radial loads and moderate axial loads, making them ideal for use in demanding machinery such as mining, construction equipment, and industrial gearboxes, where shaft misalignment may frequently occur.

Composition of Spherical Roller Bearings

Spherical roller bearings are a type of rolling-element bearing that supports rotation with low friction and permits angular misalignment. These bearings are commonly used to support a rotating shaft in the bore of the inner ring, even when that shaft is not perfectly aligned with the outer ring. This unique self-aligning capability comes from the spherical internal geometry of the outer ring and the special shape of the rollers.

Key structural features include:
Inner Ring: Two raceways inclined at an angle to the bearing axis.
Outer Ring: One common spherical raceway to accommodate angular movement.
Rolling Elements: Although called “spherical,” the rollers are barrel-shaped — not perfectly spherical. They resemble slightly over-inflated cylinders, which is crucial for managing load distribution.
Cages: Hold and separate the rollers to reduce friction and wear.
Optional Components: Depending on the design, some bearings include internal guide rings or center rings to enhance stability and guidance.
Sealing: Many spherical roller bearings can be equipped with seals to protect against contamination and extend service life.