Which components are included in the principal parts of a friction bearing housing?

The principal parts of a friction bearing housing include crucial components that collectively provide structural integrity and facilitate the proper functioning of the bearing. The choice that indicates the base, bolt slots, the cap, and the cap bolt holes accurately represents the essential elements in a friction bearing housing.

The base serves as the foundational support for the entire assembly, ensuring stability during operation. Bolt slots are critical for accommodating fastening elements that secure the cap to the base and maintain the alignment and position of the bearing. The cap itself is vital because it covers and protects the bearing liner while also providing a means to fit the assembly together securely. Cap bolt holes are integral to this process, as they allow for the insertion of bolts that firmly attach the cap, sealing the assembly and preventing any movement that could lead to premature wear or failure.

This selection encompasses both functional and structural aspects necessary for the successful operation of a friction bearing housing, making it the most comprehensive representation among the choices provided. The other options either miss out on essential components or include elements that do not accurately describe the principal parts specific to a friction bearing housing, thereby not capturing the complete assembly required for optimal performance.