SmartROC D65 Tier 4 Final 2 General
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n Strand displacement
n Waviness
n Cracking
n Kinks
n Flattening
n Local cable diameter decrease
n Local cable diameter increase
n Basket formation
Wire displacement
Individual wires or wire groups stick out like hairpins on the side facing away from the
drum. Wire displacement is caused by spasmodic loads.
Cables with wire displacement must be scrapped.
Example of wire displacement
Strand displacement
Strand displacement, which often occurs in conjunction with basket formation, is when the
steel core pushes out between the strands.
Cables with strand displacement must be scrapped.
Waviness
Waviness is a deformation that gives the cable's longitudinal axis a helical curve.
Even though wave formation does not necessarily cause weakening of the cable, such a
deformation can cause a pulsing movement.
After a long time of operation, this can increase surface wear and wire breaks.
In the event of waviness, the cable should be scrapped if
d
1
> 4d/3
d = Cable's nominal diameter
d
1
= Diameter of the circle that would be formed if the cable were not deformed. Check
over a length not exceeding 25d.
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