Are flexible couplings typically lubricated?

The correct choice highlights that many flexible couplings are designed to be lubricated to ensure optimal performance and longevity. Lubrication helps to minimize wear and tear between the moving parts within the coupling, reducing friction and preventing overheating. This is particularly important in applications where high speeds or heavy loads are present, as proper lubrication contributes to smoother operation and can significantly extend the life of the coupling.

On the other hand, while some types of flexible couplings require no lubrication (which would correspond to options that suggest they are not lubricated), many conventional types indeed benefit from regular lubrication to function effectively. It's also crucial to note that while certain designs may appear self-lubricating due to particular materials or treatments, they often still require some level of care to maintain their performance. Understanding the lubrication requirements of specific coupling types is essential for maintenance and operational efficiency in power engineering applications.