A floating shaft is characterized by which of the following?

• A. Not supported directly by any bearing
• B. Supported by a single bearing
• C. Supported by two bearings
• D. Supported by three bearings

Answer: (A)

A floating shaft is not directly supported by any bearing along its length. In this arrangement, the shaft just connects components (like gears or pulleys) that themselves are mounted on bearings in their own housings. The loads are transmitted through those attached parts to their bearings, not absorbed directly by a bearing gripping the shaft itself. Because there’s no bearing supporting the shaft directly, the alignment and fit of the hub connections become crucial, and any wear or looseness can affect how the shaft remains centered.

If a shaft were supported by a bearing, or by multiple bearings, it would be described as being directly supported by bearings, which is not the case here.