core designations are: fiber core (FC), independent wire rope core (IWRC) , and
wire strand core (WSC) (Fig. 2). Catalog descriptions
of
the various available
ropes always include these abbreviations to identify the core type. In selecting
the most appropriate core for a given application, consult a wire rope manufac-
turer for guidance.
To summarize, a wire rope consists, in most cases,
of
three components: wires,
strands, and a core (Fig.
i).
To
these could be added other components such as
lubricant and polymer. Lubricant is vital to the satisfactory performance
of
most
wire ropes. Polymers are used either as a coating
or
filling
of
the wire rope
or
core to enhance performance in specific applications.
FIBER
(Fe)
INOEPENO€NT
WIRE
ROPE
CORE
(lWRCI
WIRE
STRANO
(WSC)
Figure 2. The three basic wire rope cores.
In selecting the most appropriate core for a
given application, a wire rope manufacturer
should be called upon for guidance.
The core is the foundation
of
a wire rope.
If the core cannot support the compressive
load imposed, the rope will lose
its clearance
between strands and its service life will
be
shortened. Steel cores (WSC
or
IWRC) should
be
used when there is any evidence that a fiber
core will not provide adequate support. Also,
if
the temperature
of
the environment may be
expected to exceed
180° (S2°C) steel cores
must be used.
8'
Wire Rope Technical Board - Wire Rope Users Manual, Fourth Edition
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