Wire Rope

Broken wire removal criteria cited in many standards and specifications, like those listed below, apply to wire ropes operating on steel sheaves and drums. For wire ropes operating on sheaves and drums made with material other than steel, please contact the sheave, drum or equipment manufacturer or a qualified person for proper broken wire removal criteria.

Valley wire breaks where the wire fractures between strands or a broken wire protrudes between strands
are treated differently than those that occur on the outer surface of the rope. When there is more than one valley break, replace the rope.

Frequent inspections and written records help determine the rate at which wires are breaking. Replace
the rope when the values given in the table below are reached.

A major portion of any wire rope inspection is the detection of broken wires. The number and type of broken wires are an indication of the ropes general condition and a benchmark for its replacement.

REMOVAL CRITERIA

Drum crushing is caused by small drums, high loads and multiple winding conditions.

Heres a wire rope that has jumped a sheave. The rope curled as it went over the edge of the sheave. When you study the wires, youll see two types of breaks here: tensile cup and cone breaks and shear breaks that appear to have been cut on an angle.

Its caused by pulling down a loop in a slack line during handling, installation or operation. Note the distortion of the strands and individual wires. This rope must be replaced.

• Wire Rope Wear And Removal Criteria

  TYPICAL EVIDENCE OF WEAR AND ABUSE