What do ball bearings do?

What do ball bearings do?

• A. Used in areas of high centrifugal force
• B. Support radial and axial load
• C. Absorb loads from drive shafts
• D. Support compressor and turbine rotors

Answer: (B)

Ball bearings enable smooth rotation by carrying load between moving parts while reducing friction. They use inner and outer races with rolling balls between them, so the load is carried through rolling contact rather than sliding contact, which lowers friction and wear. The loads they handle include radial loads, which act perpendicular to the shaft, and axial loads, which act along the shaft. The ability to take on axial load depends on the bearing type (for example, angular-contact or thrust bearings are designed to handle significant axial forces, while standard radial bearings primarily resist radial loads). This combination of carrying both directions of load, as dictated by the bearing design, is what makes ball bearings versatile in many rotating assemblies. Choosing “support radial and axial load” reflects this general function. The other statements are more limited in scope—ball bearings aren’t defined by high centrifugal environments, they don’t merely “absorb” loads from drive shafts, and they aren’t exclusive to supporting compressor and turbine rotors.

Ball bearings enable smooth rotation by carrying load between moving parts while reducing friction. They use inner and outer races with rolling balls between them, so the load is carried through rolling contact rather than sliding contact, which lowers friction and wear.

The loads they handle include radial loads, which act perpendicular to the shaft, and axial loads, which act along the shaft. The ability to take on axial load depends on the bearing type (for example, angular-contact or thrust bearings are designed to handle significant axial forces, while standard radial bearings primarily resist radial loads). This combination of carrying both directions of load, as dictated by the bearing design, is what makes ball bearings versatile in many rotating assemblies.

Choosing “support radial and axial load” reflects this general function. The other statements are more limited in scope—ball bearings aren’t defined by high centrifugal environments, they don’t merely “absorb” loads from drive shafts, and they aren’t exclusive to supporting compressor and turbine rotors.