Why are multiple strand chains used in mechanical drives?

The use of multiple strand chains in mechanical drives is primarily beneficial for transmitting a significant amount of power. A multiple strand chain effectively increases the contact area between the chain and the sprockets, allowing the system to handle higher loads without increasing the overall size of the drive components excessively. With more strands engaged, the load is distributed over several links, which enhances the drive's strength and capacity to transmit power efficiently. This characteristic is essential in applications that require reliable power transmission in tight spaces or high-load scenarios, making multiple strand chains a preferred choice in various mechanical systems.

In addition, while multiple strands may contribute to smoother operation, reduce wear, or impact size in some ways, those aspects are secondary to the primary purpose of maximizing the power transmission capability of the drive.