Do NOT downgrade the SWL of wire rope because it is old, worn, or in poor condition. Wire rope in these conditions should be cut up and discarded.
Some of the common causes of wire rope failure are the following:
Using incorrect size, construction or grade
Dragging over obstacles
Operating over sheaves and drums of inadequate size
Overriding or cross winding on drums
Operating over sheaves and drums with improperly fitted grooves or broken flanges
Jumping off sheaves
Exposure to acid fumes
Use of an improperly attached fitting
Grit being allowed to penetrate between the strands, causing internal wear
Being subjeted to severe or continuing overload
Attachments can be put on a wire rope to allow it to be attached to other ropes; for example, pad eyes, chains, or equipment.
Some end fittings that are easily and quickly changed are wire rope clips, clamps, thimbles, wedge sockets, and basket sockets. Generally these attachments permit the wire rope to be used with greater flexibility than a more permanent splice would allow. These attachments allow the same wire rope to be made in numerous different arrangements.
Wire rope clips are used to make eyes in wire rope, as shown in figure 5-8. The U-shaped part of the clip with the threaded ends is called the U-bolt; the other
Figure 5-8. - Wire rope clipsContinue Reading