A Pillow Block Bearing is a mounted anti-friction bearing that is contained within a solid cast iron, ductile iron or cast steel housing unit. Also referred to as a housed bearing unit, meaning they are self-contained, greased, sealed and ready for installation on the equipment.

Concept：

The outer spherical ball bearing is actually a variant of deep groove ball bearing,characterized by its outer ring outer diameter surface is spherical, which can be fitted into the corresponding concave spherical bearing seat to play a role of self-aligning.
The outer spherical bearing is mainly used to bear the combined radial and axial loads mainly in the radial load, generally no suitable to bear the axial load alone.
The outer spherical bearing with seat is a kind of bearing element which combines the rolling bearing with the bearing seat. Most of the outer spherical bearings are made of spherical outer diameter and installed together with the bearing seat with spherical inner hole. The structure is diverse, and the versatility and interchangeability are good.

Characteristics and classification:

This kind of bearing is also designed with a certain centrality, easy to install, with a double structure of sealing device, can work in harsh environment. The bearing seat is generally molded by casting.

Commonly used seat is vertical seat (P), square seat (F), boss square seat (FS), boss round seat (FC), diamond seat (FL), ring seat (C), slide block seat (T).

Main applications of pillow block bearing:

Suitable for applications requiring simple equipment and parts, such as agricultural machinery, transportation systems or construction machinery.

What are pillow block bearings made of?

Material. Pillow Block Bearings is usually made of aluminum that offers high loading carrying capacity and heat conductivity. On the other hand, pressed steel is used in low load carrying applications yet it offers high performance with precision. Stainless steel is used because of its ability of corrosion resistance.

A pillow block bearing is a pedestal used to provide support for a rotating shaft with the help of compatible bearings and various accessories. The assembly consists of a mounting block which houses a bearing. The block is mounted to a foundation and a shaft is inserted allowing the inner part of the bearing / shaft to rotate. The inside of the bearing is typically 0.025 millimetres (0.001 in) larger diameter than the shaft to ensure a tight fit.set screws,locking collars , or set collars are commonly used to secure the shaft. Housing material for a pillow block is typically made of cast iron or cast steel.

A pillow block may contain a bearing with one of several types of rolling elements, including ball, cylindrical roller, spherical roller, tapered roller, or metallic or synthetic bushing. The type of rolling element defines the type of pillow block.