Figure 6-52.Trough method of lubricating wire rope.
Avoid prolonged skin contact with oils
and lubricants. Consult the Materials Safety
Data Sheets (MSDS) on each item before use
for precautions and hazards. See your
supervisor for copies of MSDSs.
As a safety precaution, always wipe off any excess
oil when lubricating wire rope especially with hoisting
equipment. Too much lubricant can get into brakes or
clutches and cause them to fail. While in use, the
motion of machinery may sling excess oil around over
cranes cabs and onto catwalks making them unsafe.
Properly dispose of wiping rags and used
or excess lubricants as hazardous waste. See
your supervisor for details on local disposal
Wire Rope Attachments
Attachments are fitted to the ends of wire rope, so
the rope can be connected to other wire ropes, pad eyes,
or equipment. The common attachments used are the
wedge socket, the speltered socket, wire rope clips, the
thimble, swaged connections, and hooks and shackles.
WEDGE SOCKET.The attachment used most
often to attach dead ends of wire ropes to pad eyes or
like fittings on cranes and earthmoving equipment is
the wedge socket (fig. 6-53). The socket is applied to
the bitter end of the wire rope.
Figure 6-53.Wedge socket.
The wedge socket develops only 70
percent of the breaking strength of the wire
rope due to the crushing action of the wedge.
SPELTERED SOCKET.Speltering is the best
way to attach a closed or open socket in the field.
means to attach the socket to the wire
rope by pouring hot zinc around it, as shown in figure
6-54. Speltering should be done by qualified
Forged steel speltered sockets are as strong as the
wire rope itself. Speltered sockets are required on all
cranes used to lift personnel, ammunition, acids, and
other dangerous materials.
Spelter sockets develop 100 percent of the
breaking strength of the wire rope.
WIRE ROPE CLIPS.Wire rope clips are used
to make eyes in wire rope, as shown in figure 6-55. The
U-shaped part of the clip with the threaded ends is
called the U-bolt; the other part is called the saddle.
The saddle is stamped with the diameter of the wire
rope that the clip will fit. Always place a clip with the
Figure 6-54.Speltering a socket.