Wire Rope Storage And Handling

Wire Rope must be properly stored when not in use, in order to :

• Protect them from grit and dirt,
• give ready access to them,
• permit accurate, complete visual inspections.

Wire Rope must be handled in manner to prevent kinking or twisting. improper rigging and lifting shortens the working live of a rope and put your employees and equipment in dangers.

Compacted Wire Rope

Compacted strand wire rope is manufactured from strands which have been reduced in diameter by one of several swaging processes. The outer wires of the strand are flattened and the internal wires are no longer round. Compared to standard wire rope of the same diameter, a compacted rope has a greater cross-sectional metallic area resulting in higher strength and its smoother surface makes it more abrasion resistant.

Low-Rotation Wire Rope

A certain amount of rope spin is natural during the operation of most cranes.  This should be kept to a minimum as excessive rotation can cause serious fatigue.  On single-fall cranes, the damaging effect of spin can be reduced by installing a free-moving ball bearing swivel between the rope and the load.  In cases where spin is particularly troublesome it is often advisable to change to a low-rotating construction.

A low-rotation or an anti-twist wire rope consists of an inner layer of strand laid in one direction covered by a layer of strand laid in the opposite direction.  This has the effect of counteracting torque by reducing the tendency of the finished rope to rotate. 

Wire And Strands

Wire ropes are made up by laying wire strands around a core.  The strands themselves are made up of between 3 - 91 wires.  The more wires per strand the more flexible the rope will be.

6x36 FC = 6 strands each made up of 36 wires. 

Strands laid around a Fibre Core.

  

6x19 IWRC = 6 strands each made up of 19 wires. 

Strands laid around a Steel Core. 

 

 

The Construction of A Wire Rope

Wire rope consists of a group of strands laid helically around a core. The strands of a wire rope consist of a number of individual wires laid about a central core.

Wire rope is versatile. It can be used to transmit motion through almost any plane or angle, to guy or tie down, to hold back, launch or control; to counterbalance, to guide or to lift or to do hundreds of other jobs.

Most people do not think of wire rope as a machine, but it is. It is a machine composed of precise, moving parts, all designed to bear a very definite relation to one another. In fact, some wire ropes contain more moving parts than many complicated mechanisms. A six strand rope consisting of 36 wires per stand with an independent wire rope core contains a total of 265 individual wires. All of these must be able to bend and move with respect to one another if the rope is to have the flexibility necessary for successful operation.