COMPACTED STRAND WIRE ROPE
Compacted strand wire rope is a wire rope manufactured from strands which
have been compacted or reduced in diameter either in the stranding operation or
in a separate operation after stranding prior to closing
of
the rope. There are var-
ious known methods for compacting; drawing the strand through a compacting
die, roller reduction and rotary swaging are several examples. The compacting
process flattens the surface
of
the outer wires and reforms internal wires
of
the
strand to increase the density
of
the strand. The result is a smoother bearing sur-
face at the strand crowns and an increase in minimum breaking force over round
strand rope
of
the same diameter and classification. Cross section diagrams
of
rope with compacted strands are found in Figure 12.
Tables
37,38
& 39 show compacted strand rope minimum breaking forces
commonly available in 6 strand rope, 19 strand rotation resistant rope and 35
strand rotation resistant rope. For information on the exact minimum breaking
force available on a particular rope, consult the manufacturer
of
the rope.
6 x 26 Warrington Seale
Compacted Strand
IWRC
8 x 26 Warrington
Seale
Compacted Strand
IWRC
Figure 12. Compacted Strand Wire Rope Cross Sections.
COMPACTED (SWAGED) WIRE ROPE
19
x 19 Seale
Compacted Strand
A compacted (swaged) wire rope is compacted or reduced in diameter in a
separate operation following closing
of
the rope. A compacted wire rope can be
made with non-compacted strands or compacted strands. Rotary swaging is the
most common process to compact the rope, although other processes may be
used. As illustrated in Figure 13, the wires and strands
of
the rope are flattened
to produce a relatively smooth and wear resistant outer surface. Compacted
ropes generally have good wear resistance. crushing resistance and high
strength. However. compacted (swaged) wire rope may not have bending fatigue
resistance that is equivalent to standard or compacted strand wire ropes, espe-
cially at small bending ratios. Minimum breaking forces for some
compacted
rope are found
in
Table 42.
3 x 19 Seale
Compacted (Swaged)
6 x 26 Warrington
Seale
Compacted (Swaged)
IWRC
Figure
l3.
Compacted
Wire
Rope cross sections.
6 x
31
Warrington Seale
Compacted (Swaged)
IWRC
Wire Rope Technical Board - Wire Rope Users Manual, Fourth
Edition·
21
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