Machinery's Handbook, 31st Edition
2718 Wire Rope rope is usually furnished in Lang lay and may be obtained with fiber core or independent wire rope core. The three types shown in Table 6 and Fig. 6a through Fig. 6c are flexible and are designed for hoisting work.
Fig. 6c. 6 × 27 with Fiber Core
Fig. 6a. 6 × 25 with Fiber Core
Fig. 6b. 6 × 30 with Fiber Core
Table 6. Weights and Strengths of Flattened Strand Wire Rope, Preformed and Not Preformed
Breaking Strength, Tons of 2000 Lbs.
Breaking Strength, Tons of 2000 Lbs.
Approx. Weight per Ft., Pounds
Approx. Weight per Ft., Pounds
Impr. Plow Steel
Mild Plow Steel
Impr. Plow Steel
Mild Plow Steel
Dia., Inches
Dia., Inches
0.25 0.45 0.57 0.70 1.01 1.39 1.80 2.28 2.81
6.71
… 1 3 ∕ 8
3.40 4.05 4.75 5.51 7.20 9.10
85.5
… … … … … … … … …
a a
3 ∕ 8 1 ∕ 2 5 ∕ 8 3 ∕ 4 7 ∕ 8
11.8 14.9 18.3 26.2 35.4 46.0 57.9 71.0
8.94
101 118 136 176 220 269 321
1 1 ∕ 1 5 ∕ 1 3 ∕ 4 2 8 2 1 ∕ 4 2 1 ∕ 2 2 3 ∕ 4 2
11.2 13.9 19.8 26.8 34.8 43.8 53.7
a
9 ∕ 16
11.2 13.6
1
1 1 ∕ 8 1 1 ∕ 4
… …
…
a These sizes in Type B only. Type H is not in US Simplified Practice Recommendation. Source: Rope diagrams, Bethlehem Steel Co. All other data, US Simplified Practice Recommen dation 198-50. Flat Wire Rope: This type of wire rope is made up of a number of four-strand rope units placed side by side and stitched together with soft steel sewing wire. These four-strand units are alternately right and left lay to resist warping, curling, or rotating in service. Weights and strengths are shown in Table 7. Simplified Practice Recommendations.— Because the total number of wire rope types is large, manufacturers and users have agreed upon and adopted a US Simplified Prac - tice Recommendation to provide a simplified listing of those kinds and sizes of wire rope which are most commonly used and stocked. These, then, are the types and sizes which are most generally available. Other types and sizes for special or limited uses also may be found in individual manufacturer’s catalogs. Sizes and Strengths of Wire Rope.— The data shown in Table 1 through Table 7 have been taken from US Simplified Practice Recommendation 198-50 but do not include those wire ropes shown in that Simplified Practice Recommendation which are intended primarily for marine use. Wire Rope Diameter: The diameter of a wire rope is the diameter of the circle that will just enclose it, hence when measuring the diameter with calipers, care must be taken to obtain the largest outside dimension, taken across the opposite strands, rather than the smallest dimension across opposite “valleys” or “flats.” It is standard practice for the nominal diameter to be the minimum with all tolerances taken on the plus side. Limits
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