Does the ability of an expander bearing to withstand high loads primarily depend on its ball or roller design?

The bearing of the expander can usually withstand high loads, mainly because it uses a ball or roller design, which can significantly reduce the contact area. Compared to ordinary sliding bearings, the ball or roller of the rolling bearing interacts with the drive shaft by rolling, thereby reducing the contact area and reducing the friction between the surfaces.
Traditional sliding bearings mainly rely on lubricating materials such as grease and oil to reduce friction and wear during operation. However, under high-load and high-speed working conditions, the lubrication effect of sliding bearings may be limited, resulting in overheating, increased wear, and even failure of the bearings.
Grease is a semi-solid lubricating material made of polymer base oil and thickener, which has good high-temperature stability and strong compressive properties. When grease is filled between the balls or rollers of the expander bearing, it can form a uniform lubrication film during the friction process, reducing the friction coefficient and energy loss. At the same time, grease can also effectively isolate external impurities and moisture, preventing bearing damage due to contamination.
The bearings of the expander often also use steel balls or steel rollers as rolling elements, which can increase the bearing capacity of the bearing. Steel balls or steel rollers have high hardness and strength, and can withstand large loads. Moreover, bearings with rolling elements also have good radial and axial motion characteristics, which can meet the working requirements under complex conditions.
The ability of the expander bearing to withstand high loads is mainly due to its design of ball or roller and the use of lubricating materials such as grease. The design of the rolling element reduces the contact area and reduces the friction between the surfaces. Grease and other lubricating materials can provide good lubrication effect, reducing friction and wear. These characteristics enable the expander bearing to work stably under high load and high speed conditions and extend the service life of the bearing.