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Steel Wire Ropes |
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▪ Pressed steel wire rope slings
▪ Pressed Steel - twisted wire rope slings
▪ Spliced steel wire rope slings
▪ Cast slings bind slings non-tie steel wire rope slings
▪ Range 6mm to 52 mm diameter |
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| IS 2268 / 89 |
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| Nom. |
2417Mass x12591826 |
6 x19 (12/6/1)
IS:2266/89 |
Mass 6 x 36/6x41
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6 x 36(14/7&7/7/1)
6 x 41 (16/6&8/8/1)
IS:2266/89 |
| Dia |
Kg/100 Mtrs |
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1770 N/mm2 |
Kg / 100 Mtrs. |
1770 N/mm2 |
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FMC |
IWRC |
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FMC |
IWRC |
FMC |
IWRC |
FMC |
IWRC |
| 5 |
8.65 |
9.52 |
- |
- |
13.6 |
14.7 |
- |
- |
- |
- |
| 6 |
12.5 |
13.7 |
- |
- |
20 |
21 |
- |
- |
- |
- |
| 8 |
22.1 |
24.4 |
- |
- |
35 |
37.8 |
24.3 |
26 |
- |
- |
| 9 |
28.0 |
30.8 |
49.0 |
52.6 |
44 |
47.5 |
30.8 |
33 |
47 |
51 |
| 10 |
34.6 |
38.1 |
60.0 |
65.0 |
54 |
58.3 |
38.0 |
41 |
56 |
63 |
| 11 |
41.9 |
46.1 |
73.0 |
70.7 |
66 |
71.3 |
46.0 |
50 |
71 |
76 |
| 12 |
49.8 |
54.8 |
87 |
94 |
78 |
84.2 |
54.7 |
60 |
84 |
92 |
| 13 |
58.5 |
64.4 |
102 |
110 |
92 |
99.4 |
64.3 |
70 |
99 |
106 |
| 14 |
67.6 |
74.6 |
118 |
127 |
107 |
116 |
74.5 |
82 |
114 |
124 |
| 15 |
77.8 |
85.8 |
- |
- |
122 |
132 |
85.5 |
94 |
131 |
142 |
| 16 |
88.6 |
97.4 |
154 |
166 |
139 |
150 |
97.3 |
107 |
149 |
161 |
| 17 |
100 |
110 |
- |
- |
157 |
170 |
110 |
121 |
169 |
182 |
| 18 |
112 |
123 |
195 |
210 |
176 |
190 |
123 |
139 |
189 |
204 |
| 19 |
125 |
13 |
217 |
234 |
196 |
212 |
137 |
151 |
211 |
228 |
| 20 |
138 |
152 |
241 |
260 |
218 |
235 |
152 |
167 |
234 |
252 |
| 22 |
167 |
184 |
292 |
314 |
263 |
284 |
184 |
202 |
283 |
305 |
| 24 |
199 |
219 |
374 |
375 |
313 |
338 |
219 |
241 |
336 |
363 |
| 25 |
216 |
238 |
- |
- |
340 |
367 |
238 |
261 |
365 |
394 |
| 26 |
234 |
257 |
407 |
439 |
368 |
397 |
257 |
283 |
395 |
426 |
| 28 |
271 |
298 |
472 |
- |
426 |
461 |
298 |
328 |
458 |
494 |
| 29 |
291 |
320 |
- |
- |
458 |
494 |
320 |
352 |
491 |
530 |
| 30 |
312 |
343 |
- |
- |
490 |
529 |
342 |
376 |
526 |
567 |
| 32 |
354 |
390 |
617 |
- |
557 |
602 |
389 |
428 |
598 |
646 |
| 34 |
400 |
440 |
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- |
629 |
679 |
440 |
484 |
675 |
729 |
| 35 |
424 |
466 |
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- |
666 |
719 |
466 |
512 |
715 |
772 |
| 36 |
448 |
493 |
781 |
- |
705 |
761 |
493 |
542 |
757 |
817 |
| 38 |
500 |
550 |
870 |
- |
786 |
848 |
549 |
604 |
843 |
911 |
| 40 |
554 |
609 |
964 |
- |
870 |
940 |
608 |
669 |
934 |
1009 |
| 42 |
611 |
672 |
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- |
959 |
1036 |
670 |
738 |
1030 |
1112 |
| 44 |
670 |
737 |
1166 |
- |
1053 |
1137 |
736 |
810 |
1130 |
1220 |
| 46 |
733 |
805 |
- |
- |
1151 |
1243 |
805 |
885 |
1235 |
1333 |
| 48 |
798 |
877 |
- |
- |
12553 |
1353 |
876 |
964 |
1345 |
1452 |
| 50 |
865 |
951 |
1388 |
- |
1360 |
1468 |
950 |
1046 |
1459 |
1575 |
| 52 |
936 |
1029 |
1629 |
- |
1471 |
1588 |
1028 |
1031 |
1578 |
1704 |
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| Safety Factors |
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| A factor of safety is a multipler of the Nominal Strength to the Nominal Strength to ensure the safety of the rope over its service life, by incorporating the normal rope wear that may occur in the course of general use. |
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| Number |
10Type od Service |
Minimum Safety Factor |
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| 1 |
Hoisting Equipment |
5.0 |
| 2 |
Haulage Rope |
6.0 |
| 3 |
Overhead & Gantry Cranes |
6.0 |
| 4 |
Jib & Piller Cranes |
6.0 |
| 5 |
Derricks |
6.0 |
| 6 |
Small Electric and Air Hoists |
7.0 |
| 7 |
Hot Ladle Cranes |
8.0 |
| 8 |
Guy Ropes |
3.5 |
| 9 |
Wire Rope Slings |
5.0 |
| 10 |
Mine Shafts |
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Depths to 500 ft |
8.0 |
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Depths of 500- 1000 ft |
7.0 |
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Depths of 1000- 2000 ft |
6.0 |
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Depths of 2000- 3000 ft |
5.0 |
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Depths of 3000 or more |
4.0 |
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| Right Ropes For The Right Job |
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| Types of ropes for various applications are listed below. The operating conditions, including the design and construction of the installation affect the serive life of the wire rope. |
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| 1 |
General Engineering Rope : |
6 x 19, 6x21, 6x25, 6x36, 6x37 |
| 2 |
Earth Moving Equipment |
6x21,6x24, 6x25, 6x36, 8x31, 7x19, 7x37 Groups |
| 3 |
Logging |
6x19, 6x21, 6x25, 6x31Groups |
| 4 |
Shipping |
6x12, 6x19, 6x24, 6x25, 6x36, 6x37, 7x7, 7x19, 8x31 Groups |
| 5 |
Oil Industry |
6x19, 6x21, 6x25, 6x26, 6x31, 6x37 Groups. |
| 6 |
Mining Industry |
6x7, 6x19, 6x21, 6x25, 6x2 |
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| Discard Factors |
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| Wire ropes can be discarded if the following conditions are listed below the ultimate tensile strength. |
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| 1 |
Wear and Tear |
Internal - Wear & Tear of wires within stand and between stands
External - Scurbbing of wire rope |
| 2 |
Corrosion |
Loss of metal due to corrosive envirnoment. |
| 3 |
Fatigue |
Repeated reversal of stress leads to brittle fracture of wires |
| 4 |
External Deformation |
Presence of Corkscrew Formation, Cage Formation, Looping of Wires or stands, knots, Construction, Flattening, Curing, puffing & kinks |
| 5 |
Action of heat |
Excessive heat dries out ropes leading to risk of internal wire rupture |
| 6 |
Type, Position & Number of Wire Ruptures |
Wire ruptures in nests or strand break |
| 7 |
Abnormal Stretching |
Paralleling of the strand due to untwisting of the rope. |
| 8. |
Surface Embrittlement |
Work hardening of the wire surface leading to fatigue failure |
| 9. |
Core Collapse |
Non-circular wire rope shape.s |
| 10. |
Fitting Time |
Expected rope life from previous experience. |
| 11. |
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