• Home
  • Download PDF
  • Order CD-ROM
  • Order in Print
Figure 13-16.-Transferring wire rope from reel to drum
Wire Rope Attachments

Equipment Operator Basic - Beginning construction equipment operators manual
Page Navigation
  338    339    340    341    342  343  344    345    346    347    348  
ordinarily used and should be spaced as far apart as possible. Seizing and Cutting The makers of wire rope are careful to lay each wire in the strand and each strand in the rope under uniform tension. If the ends of the rope are not secured properly, the original balance of tension will be disturbed and maximum service cannot be obtained because some strands can carry a greater portion of the load than others. Before cutting steel wire rope, place seizing on each  side  of  the  point  where  the  rope  is  to  be  cut (fig.  13-18). A rule of thumb for determining the size, number, and distance between seizing is as follows: 1.  The  number  of  seizing  to  be  applied  equals approximately three times the diameter of the rope. Example: 3 x 3/4-inch-diameter rope = 2 1/4 inches. Round up to the next higher whole number and use three seizing. 2. The width of each seizing should be 1 to 1 1/2 times as long as the diameter of the rope. Example: 1 x 3/4-inch-diameter rope = 3/4 inch. Use a 1-inch width of seizing. Figure 13-18.-Seizing wire rope. 3. The seizing should be spaced a distance equal to twice the diameter of the wire rope. Example: 2 x 3/4-inch-diameter rope = 1 1/2 inches. Space the seizing 2 inches apart. A common method used to make a temporary wire rope seizing is as follows: Wind on the seizing wire uniformly, using tension on the wire. After taking the required number of turns, as  shown  in  step  1,  twist  the  ends  of  the  wires counterclockwise by hand, so the twisted portion of the wires is near the middle of the seizing, as shown in step 2. Grasp the ends with end-cutting nippers and twist up slack, as shown in step 3. Do not try to tighten the seizing by twisting. Draw up on the seizing, as shown in step 4. Again twist up the slack, using nippers, as shown in step 5. Repeat steps 4 and 5 if necessary. Cut ends and pound them down on the rope, as shown in step 6. If the seizing is to be permanent or if the rope is 1 5/8 inches or more in diameter, use a serving bar, or iron,  to  increase  tension  on  the  seizing  wire  when putting on the turns. Wire rope can be cut successfully by a number of methods.  One  effective  and  simple  method  is  to  use  a hydraulic  type  of  wire  rope  cutter,  as  shown  in figure 13-19. Remember that all wire should be seized before it is cut. For best results in using this method, place the rope in the cutter so the blade comes between the two central seizings. With the release valve closed, jack the blade against the rope at the location of the cut and continue to operate the cutter until the wire rope is cut. MAINTENANCE OF WIRE ROPE Wire rope bending around hoist drums and sheaves will wear like any other metal article, so lubrication is just as important to an operating wire rope as it is to any other piece of working machinery. For a wire rope to Figure 13-19.—Hydraulic type of wire rope cutter. 13-9







Western Governors University

Privacy Statement
Press Release
Contact

© Copyright Integrated Publishing, Inc.. All Rights Reserved. Design by Strategico.