In the video above, the reporter discusses the fascinating process of manufacturing chain slings, highlighting their versatility as essential lifting tools. These slings are crafted meticulously from high-quality grade 80 and grade 100 alloy steel chains in a controlled environment. The manufacturing process begins with the precise measurement of the chain, which is then cleanly severed using a high-pressure hydraulic cutting machine to eliminate the risk of heat damage.
Once the chain is cut, the reporter explains the installation of grab hooks on each end, ultimately resulting in a 20-foot-long chain sling.
The cold-cutting process is emphasized for its role in preventing heat damage to adjoining links, a common issue with cutting torches. The reporter details the final steps, including the installation of a grab hook in the correct orientation, securing the load pin with a keeper, and tracking each chain sling in a comprehensive database until retirement.
The manufacturing process concludes with a proof load testing phase, where each chain sling undergoes testing on a hydraulic incline proof testing machine generating up to two hundred twenty thousand pounds of force. The sling’s ability to stretch between five to ten percent under a calculated load is highlighted as a crucial quality check, ensuring its durability and safety in normal use. Concluding, by discovering crafting durable chains with precision and quality.
