WIRE ROPE DEFINITION
WIRE ROPE is a LIVE MACHINE with one end attached to a power source – THE WINCH.
NOTE
A winch drum needs a minimum of FIVE (5) WRAPS of wire rope before engaging the winch and loading your wire rope.
WIRE ROPE CONSTRUCTION
Wire rope is normally constructed of strands and wires.
STEEL CORE: an independent wire rope core (IWRC) adds strength (7&1/2% min) and provides a greater resistance to crushing than fiber core wire rope. Wire rope is normally constructed of strands and wires.
FIBER CORE: This type of wire rope is composed of a natural product such as – manila, jute, sisal, or synthetic products such as – polypropylene. Synthetic products offer the advantage of resistance to rotting, drying out and other forms of deterioration. Fiber core is usually impregnated with lubricant during manufacturing that acts as an internal lubricant.
REMEMBER
Ultimate Load or Breaking Strength Ratings of wire rope applies ONLY to NEW or UNUSED wire rope.
WIRE ROPE LAY
Wire Rope Efficiency Ratings are based on the Manufacturers U.L. (Ultimate Load) or Breaking Strength Rating.
NOTE: Recommended wire rope lubricant is an Asphalt or Molly based product.
WIRE ROPE TERMINATIONS
OPEN SWAGE SOCKET
Efficiency Rating – is 100%
WEDGE & SOCKET
Efficiency Rating – is a Minimum of 80%.
MECHANICAL SPLICE SWAGE
Efficiency Rating – 1/4”-1” is 93% for Fiber Core, and 96% for Steel Core Wire Ropes, with a properly Flemished Eye and prepared loop, correct Swage Sleeve and Assembly.
WIRE ROPE CLIP
Efficiency Rating – 1/8”-7/8” is Maximum of 80% with a properly prepared loop and clip installation.
REMEMBER
Proper termination procedures for SYNTHETIC WINCH LINE must be followed. Not doing so may result in damage, injury, or loss of life. For assistance and procedures, consult your rigging supplier for proper termination of your type of Synthetic Winch Line Rope and the end result of that termination types Efficiency Rating.
INSPECTING WIRE ROPE
Wire rope should be inspected each day prior to use. When using wire rope, be on the lookout for signs of damage or wear.
BIRDCAGE
EXCESSIVE CLEARANCE BETWEEN STRANDS
KINK
OPEN KINK
CLOSED KINK
BULGED SEVERLY
CORE PETRUSION
DOG-LEG KINK
