Kiswire - Steel wire rope

SINGLE STRAND ROPES are commonly called strands.
ROUND STRANDED ROPES consist of a number of strands either laid around a fibre core or metallic strand or an
independent wire rope core. They can be identified by the number to each strand.
A rope with 6 strands, each having 9+9+1wires laid around a central fibre core is designated as; 6 x (9 + 9 + 1) + FC
or more concisely 6 x 19 Seale + FC. If this same rope has an independent wire rope core, the designation will be:
6 x (9 + 9 + 1) + IWRC.
The IWRC is a metallic rope having for example a construction designated by 7 x (6 + 1) or 7 x 7. Should the strands
also contain a fibre core then the rope will be known for example as 6 x (12 + FC) + FC or 6 x 12 + 7FC.
Lastly if the rope is formed of two or more layers of strands superimposed around a FC, then it will be known as:
12 x (6 + 1) + 6 x (6 + 1) + FC or 18 x 7 + FC.
3. TYPE OF LAY
As already stated, round stranded ropes have both the strands and the wires in the strands laid helically.
Should the lay of the outer wires in the strands be in the same direction or in the opposite direction to that of the
strands in the rope, the result will be respectively a Lang’s Lay rope or an Ordinary ( Regular)
Lay rope, having a Right Hand Lay or Left Hand Lay according to the lay of the strands.
Right Hand and Left Hand lays are designated respectively Z and S.
Ordinary Lay ropes are less likely to kink and untwist, and their Ordinary Lay ropes are less subject to failure from
crushing and distortion. Because the longer length of exposed outer wires presents greater wearing surface,
Long’s Lay ropes have increased resistance to abrasion.
Greater care must be exercised when handling Lang’s Lay ropes, as they are more likely to kink and untwist than
Ordinary Lay ropes.
Ordinary Lay ropes are generally used because of their greater stability; however Lang’s Lay ropes are preferred for
guided loads such as passenger and freight elevators because the wires have a longer contact with the sheave grooves
and consequently less wear. Given equal construction and diameter, Lang’s Lay ropes are more flexible than the
Ordinary Lay type.
The wire ropes we manufacture are performed according to special methods which give them stability and eliminate
internal stresses.
Right Hand Regular Lay Rope Left Hand Regular Lay Rope Right Hand Lang’s Lay Rope Left Hand Lang’s Lay Rope
4. LUBRICATION
Wire ropes are lubricated as a protection against oxidization and to reduce friction between wires and strands.
Fiber cores are impregnated for preservation purposes. During the stranding and roping operations, all wires forming
the strand and all strands forming the rope are lubricated. The type of lubrication varies according to the application for
the rope and the type of plant for which it is intended. During the working life of the rope, lubrication should be carried
out periodically with good quality products compatible with those used during manufacture and which we shall be
pleased to indicate upon request.
Lubricants used during manufacture shall be free from solvents, moisture, aromatic compounds, alkaline soaps and
acidity both organic and inorganic. For protection of wire ropes against corrosion and frictional wear, Elephant Wire
Ropes have various kinds of lubrications as below.
06 | Steel Wire Rope