Main Applications

Original equipment rope for many North American and European overhead crane types. Used as main and auxiliary hoist line on steel mill cranes. Steel Core construction is also used for larger diameter UNI-LOC® Wire Rope Slings. One of the most versatile low strength/low cost rope constructions available.

Rope Characteristics

Very flexible wire rope with good fatigue resistance, but not as crush resistant as 6x19. In relationship to strand diameter this rope has relatively large outer wires to enhance abrasion resistance.
Fiber Core (F.C.) construction is much more elastic under load (stretch); as such it has a greater energy absorption capability but is even less crush resistant than its cousin with Steel Core (IWRC).

Standard

ASTM 1023/A 1023M, Table 14
CSA G-4-00
EN 12385-4.9
ISO 2408

Class 6x37 wire rope is NOT rotation or spin resistant.
Selected sizes available in right regular lay (RRL) AND left regular lay (LRL).

Breaking Strengths

Note: The maximum CAPACITY, WORKING LOAD LIMIT (WLL), or LINE PULL of the rope usually is 1/5 of the below stated values. For specific information consult the standards applicable to your rope application.

Class 6 x 37 IWRC (Steel Core)
Rope dia.
inch
Nominal Strength
tons of 2,000 lbs – EIPS
Weight
per foot lbs.
1/4 3.4 0.12
5/16 5.2 0.18
3/8 7.5 0.25
7/16 10.2 0.34
1/2 13.3 0.44
9/16 16.8 0.56
5/8 20.6 0.69
3/4 29.4 0.99
7/8 39.8 1.35
1 51.7 1.76
1-1/8 65.0 2.23
1-1/4 79.9 2.75
1-3/8 96.0 3.33
1-1/2 114.0 3.96
1-3/4 153.0 5.67
2 198.0 7.39
2-1/4 247.0 9.36
2-1/2 302.0 11.16
Metric 6 x 36 IWRC (Steel Core)
Rope dia.
mm
Minimum Breaking
Strength kN
Weight
per meter kg
7 34.2 0.20
8 44.7 0.27
9 56.6 0.34
10 69.8 0.42
11 84.5 0.51
12 109.7 0.60
13 118.0 0.71
14 137.0 0.82
15 157.0 0.97
16 179.0 1.07
18 226.0 1.35
19 252.0 1.51
20 279.0 1.67
22 338.0 2.02
24 402.0 2.41
26 472.0 2.83
28 548.0 3.28
Class 6 x 37 FC (Fiber Core)
Rope dia.
inch
Nominal Strength
tons of 2000 lbs – EIPS
Weight
per foot lbs.
1/4 3.0 0.10
5/16 4.7 0.16
3/8 6.7 0.23
7/16 9.1 0.31
1/2 11.8 0.40
9/16 14.8 0.51
5/8 18.4 0.63
3/4 26.2 0.90
7/8 35.4 1.23
1 45.9 1.60
Metric 6 x 36 FC (Fiber Core)
Rope dia.
mm
Minimum Breaking
Strength kN
Weight
per meter kg
6.5 27.3 0.16
8 41.4 0.25
10 68.9 0.39
11 78.2 0.46
13 109.3 0.64
14 126.0 0.74
16 165.0 0.97
18 209.0 1.23
19 233.0 1.37
20 258.0 1.52