NCCER Millwright Practice Exam 2026 – The Comprehensive All-in-One Guide for Exam Success!

When couplings are subjected to misalignment, they can cause severe wear on the shaft ends. Misalignment can create additional stress and friction during operation, leading to uneven load distribution and increased wear rates on the surfaces of the shafts. Over time, this can result in damage such as scoring, pitting, or even complete failure of the shaft or coupling.

It's essential to maintain proper alignment to ensure that the couplings can function efficiently without negatively impacting the lifespan of the mechanical components involved. By addressing alignment issues, operators can prevent the severe wear that would otherwise compromise the integrity of the shafts and the overall reliability of the machinery.