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to Technical Information Main Page |
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| Mechanical Damages |
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Fittings |
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It is nearly impossible
to list all variations of mechanical damage a rope might be subjected to.
Therefore, the following list should only be taken as a guideline. None
of these damages are repairable. However, the magnitude of the damages may
vary from a slight cosmetic damage to total destruction of the wire rope.
If you are not sure about the extent of the damage, change the rope, or
call us for technical assistance and advice.
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Bird Cage (6-strand rope) caused
by shock loading. |
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Bird Cage (non-rotating rope) caused
by worn sheave grooves. |
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Bird Cage forced through a tight
sheave.
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Protruding Core because of shock
loading, torque build-up during installation, tight sheaves, or incorrect
rope design. |
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Inspect the fittings on your rope
and look for wire breaks at the shank of sockets or sleeves. Inspect the
fittings for wear, distortion, cracks, and corrosion. Follow the inspection
criteria of the fitting manufacturer and DO NOT ATTEMPT TO REPAIR ANY WIRE
ROPE FITTING YOURSELF! Watch for missing hook latches and install new ones
if necessary. If latches wear out too rapidly, ask us for special Heavy
Duty latches which may fit your hook. Some hook manufacturers offer self-locking
and special Gate Latch hooks. |
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Inspect wire rope
at all fittings. Replace fitting if any broken wires are detected. |
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| Example of a wire rope which jumped
out of the sheave. Note the imprint of the sheave flange. |
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| Example of a rotation resistant wire
rope which was forced to run in too tight sheave grooves. Result is
so called 'core popping'. |
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| Kinks |
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| Kinked wire rope due to inproper
installation procedure. |
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| Kinked wire ropes which have been
used. Kinks are pulled tight and caused distortion and failure. |
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| Wire rope rolled off a sheave |
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| Multiple drum winding: Layer-to-Layer
Crushing |
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| Smooth drum winding: Srubbing
between drumwraps |
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| Smooth drum winding: Crushing
at Crossover Points |
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