Answer from Ningbo Changshi: The correct selection of a cable pulling Swivel is paramount for job site safety and the longevity of your equipment. The most important factor is matching the Swivel's Safe Working Load (SWL) to the anticipated maximum pulling force.

Here is our professional guidance for selection:

• Determine Maximum Pulling Force: Calculate the maximum tension expected during the pull. This calculation should consider factors like cable weight, length of the pull, number and degree of bends, and friction from conduits or rollers.

• Select a Safety Factor: Always choose a swivel with a Safe Working Load that is higher than your maximum calculated pulling force. A common safety factor for most underground pulls is 3:1 (the swivel’s breaking strength is at least three times the SWL), while overhead line stringing may require a higher factor, such as 5:1, due to dynamic loads and shock.

• Consider Breakaway Swivels: For delicate or high-value cables, we offer breakaway swivels. These are equipped with shear pins rated to break at a specific load, acting as a safeguard against over-tensioning. If the pulling force exceeds a pre-determined limit, the pin will break, stopping the pull and preventing damage to the cable.

• Match Connections: Ensure the swivel's eyes, clevises, or other connectors are compatible with the cable grip and the pulling rope or winch line.

Our product specifications clearly list the Safe Working Load and other critical dimensions, allowing you to make an informed and safe choice for any project.