Lifting Slings

The photo demonstrates a current US military specification for the construction of helicopter lifting slings. A sling is constructed from large diameter high tensile strength synthetic cordage with hand woven eyelets. Each lifting eye is first coated with our Purecast 603 semi-rigid casting polymer (black). Purecast was chosen for its excellent abrasion resistance on the primary contact points of the sling.  Next a rubber (75 shore A) neck of CS 252 (black) is cast around the cord using a two part, mold.  The cast in place rubber provides additional abrasion and impact resistance around the eyelet base.  All identifying numbers and specification information is cast into the rubber of each eyelet.  The length of cordage between eyelets is dip coated in our Vinyl Rope Coating (green) to enhance abrasion resistance and color code each class of sling.  The potted lifting eyes are constructed by using a 2 sided silicone rubber mold placed around the eyelet.  The CS 252 is then mixed and poured into the mold surrounding the cordage, when cured the eyelets are then removed from mold.