Hoists and other moving machinery must lift the test load through at least how many revolutions of all moving parts?

The requirement for hoists and other moving machinery to lift the test load through at least one complete revolution of all moving parts is fundamental to ensuring the equipment's reliability and safety. Completing one full revolution allows for a thorough assessment of the mechanisms involved, including gears, chains, and any other moving parts that contribute to the lifting process.

This initial revolution enables operators to observe how the entire system reacts under load, looking for any irregularities or points of failure that may not be evident during static tests. By putting moving parts through this motion, technicians can detect issues such as misalignments, wear, or weaknesses that could lead to malfunctions during regular operations, thereby enhancing operational safety.

While multiple revolutions might provide additional data, the minimum standard is set at one complete revolution to balance efficiency and thoroughness in testing. This approach helps streamline inspections and ensures that equipment meets safety criteria without unnecessary delays, making it a practical requirement in the margin for error in operational scenarios.