Which misalignment condition occurs when the centerlines of the shafts are parallel but not in line?

The condition described occurs when the centerlines of the shafts are parallel but not aligned along the same axis. This typically refers to offset misalignment, where one shaft is offset to the side of the other but both maintain parallelism. In practical terms, this often results in increased wear on bearings and other components because the shafts cannot effectively transmit motion without some form of lateral displacement.

Recognizing this type of misalignment is crucial for maintenance and alignment procedures since it indicates that while the shafts are positioned well angularly (parallel), adjustment is necessary to bring the axes into the same line. Ensuring that shafts are properly aligned in this way helps prolong equipment life and reduce operational issues.