SPLICES AND ATTACHMENTS
There are many methods of forming loops in wire rope and attaching fittings and terminals. The methods most widely used and which have proven best for wire rope slings are explained below. Some attachments lower the strength of the sling more than others. Different splices have different characteristics. Mechanical splices, while very strong, sometimes cannot be tolerated because of their size. The best splice is the one that will handle your specific requirement best. The same is true for terminals and fittings. The application and need for maximum safety should dictate these requirements.
1. Mechanical Splices
Mechanical splices are used to form loops and thimble splices, or to splice two ends of a General Purpose or Cable-Laid Body together to form an endless sling. Metal sleeves are bonded to the wire rope by compression under great pressure in a hydraulic press. Metal of the sleeve cold flows around the rope and strands.
A. Titon Roll Splice.
A Titan Roll Splice is a “Flemish” splice with the strand ends secured to the body of the sling by a metal sleeve. The Titan Roll Splice is the most effective splice available as it combines the advantages of a hand splice and a mechanical splice for double assurance. Our practice is to separate the strands into two groups: 3 strands, and 3 strands plus the core. The strands are then re-laid to form the loop. A seamless metal sleeve is positioned over the strand ends and compressed sunder great pressure in a hydraulic press. The sleeve metal cold flows around the rope strands and wires, developing maximum holding power. The Titan Roll Splice assures a strong and evenly balanced splice. There are no dangerous wire ends exposed. Titon Roll Splices are used to form loops (eyes) and thimble splices on both General Purpose and Cable-Laid Slings.
B. Titon Couple Splice (Return Loop).
This is the simplest mechanical splice, with the rope bending back on itself to form the eye. Attach-ment is made by compressing a sleeve over the junction.
2. Hand Splices
Hand Splices are formed by “weaving” the strands of the rope end into the body to form a loop, or to join two ends of a rope to form a continuous loop. Inspection is easy, and hand splices are frequently used on applications where it is necessary to pull the sling out from under a load.
A. Liverpool Splice.
A “Liverpool” splice is a flexible, basic hand splice used for wire rope. It may be used to form loops or thimble splices. A Liverpool splice may be covered with a serving of wire to protect against exposed ends.
B. Hidden (Wailes) Splice.
The Hidden or Wailes Splice is hand made and very smooth in appearance. All strand ends and wire ends are tucked in. This is the preferred Hand Splice for slings used on applications where wire ends could be a hazard to men working with the sling. Hidden Splices are used only to form eyes on General Purpose Body style with Fiber Core.
3. Swaged Socket Attachment
Sockets and other fittings can be attached to the ends of the sling body by swaging. The metal in the shank of the socket or terminal is bonded to the wire rope by compressing it under great pressure in a hydraulic press. The metal cold flows around the strands and wires forming a secure bond. These fittings can develop the catalog breaking strength of IWRC rope. Swaged Sockets are normally attached to General Purpose Slings only. This type of end attachment provides excellent resistance to vibration fatigue.
4. Spelter Socket Attachment
The socket of fitting is firmly attached to the carefully prepared end of a wire rope by filling the basket of the fitting with molten zinc. The zinc fills the basket and surrounds the broomed out wires to form both a mechanical and chemical bond. This type of attachment, when properly installed, will develop the catalog breaking strength of the rope body. Spelter Sockets are attached to General Purpose Slings only.