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KULKONI,
INC.
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| STRAND
PATTERNS: They
refer to different types of arrangements of wires and their diameters
within a strand. Common strand patterns are Filler Wire, Seale, Warrington
and combinations thereof. |
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| LAY:
indicates how the wires have been laid to form strands and how the
strands have been laid around the core. A right regular lay rope (RRL;
the most common) has its strands laid right on the rope - similar
to threading a right-hand threaded bolt. Regular means that the direction
of the wire lay in the strand is opposite to the direction of the
strand lay in the rope. (The wires in regular lay rope appear to be
in line with the axis of the rope). |
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| CAUTION: When combining separate ropes in a single line application always use ropes of the same lay pattern. Different lays can increase rotation at connection points decreasing rope efficiency. | |
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 Right Lang Lay (RLL) |
 Left Regular Lay (LRL) |
 Left Lang Lay (LLL) |
PREFORMING: A manufacturing process wherein the strands and their wires are permanently formed - during fabrication - to the helical shape that they will ultimately assume in the finished wire rope. Proper preforming prevents the strands and wires from unlaying during normal use. The vast majority of wire rope sold today is preformed. |
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| FINISH:
Wire rope is either sold as "bright" (or "black") - meaning uncoated,
or galvanized for better corrosion resistance. "Drawn Galvanized"
wire has the same strength as bright wire, but wire, "galvanized at
finished size" is usually 10% lower in strength. Plastic coated wire
rope is also available, usually galvanized or stainless steel cable.
The most common plastic coatings are vinyl or nylon in either clear
or white, although other materials and colors are available. These
coatings do not add strength to the wire rope itself. |
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| LUBRICATION:
During
fabrication, wire ropes receive lubrication. The kind and amount depends
on the rope's size, type and use, if known. This in-process treatment
will provide the finished wire rope with ample protection for a reasonable
time if it is stored under proper conditions. But, when the wire rope
is put into service, the initial lubrication will normally be less
than needed for the full useful life of the wire rope. Because of
this, periodic applications of a suitable wire rope lubricant are
necessary. |
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| ORDERING
WIRE ROPE:
Construction, lay, core, finish and other factors mentioned above
impart greatly differing characteristics to different wire ropes.
They must be understood and considered when selecting wire rope. There
is no perfect wire rope for all applications; usually some less desirable
properties are traded off for other, more desirable ones. Refer to
the Wire Rope Users Manual by the Wire Rope Technical Board for a
better understanding of wire rope properties and consult professional
help when in doubt. |
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Lacking a complete
description of the wire rope desired, a supplier can make several
assumptions:
1. If direction
and type of lay are omitted from the rope description, it is assumed
to be right regular lay (RRL).
2. If finish
is omitted, this will be presumed to mean ungalvanized, "bright"
finish.
3. If no mention
is made with reference to preforming, preformed wire rope will be
supplied.
4. If a supplier
receives an order for 6 x 19 wire rope he may assume this to be
a class reference and is, therefore, legally justified in furnishing
any construction within this category.
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