Which is NOT a type of shaft misalignment?

Shaft misalignment refers to the condition where two or more shafts do not align properly along their intended axis, which can lead to increased wear and reduced efficiency in machinery. The types of shaft misalignment that professionals typically recognize include angular, parallel, and combination.

Angular misalignment occurs when the shafts are misaligned at an angle to each other, causing the coupling to operate at an angle. Parallel misalignment arises when the shafts are offset from one another but remain parallel. Combination misalignment is a mix of both angular and parallel misalignment, where elements of both types are present.

The term "skewed" is not typically recognized as a standard category of shaft misalignment in technical literature and practice. Instead, angular or parallel misalignment would be the ways in which shafts can become misaligned. Therefore, identifying skewed as not being a type of misalignment aligns with conventional terminology and understanding in the field of shaft alignment and maintenance.