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AC 43.13-1B 9/8/98 TABLE 7-3. Flexible cable construction and physical properties. NOMINAL DIAMETER OF WIRE ROPE CABLE CONSTRUCTION TOLERANCE ON DIAMETER (PLUS ONLY) ALLOWABLE INCREASE OF DIAMETER AT CUT END MIL-W- 83420 COMP A MIL-W- 83420 COMP B (CRES) MIL-C- 18375 (CRES) INCHES INCHES MINIMUM BREAKING STRENGTH (Pounds) INCHES LBS LBS LBS 1/32 3/64 1/16 1/16 3/32 3/32 1/8 5/32 3/16 7/32 1/4 9/32 5/16 11/32 3/8 7/16 1/2 9/16 5/8 3/4 7/8 1 1 - 1/8 1 - 1/4 1 - 3/8 1 - 1/2 3x7 7x7 7x7 7 x 19 7x7 7 x 19 7 x 19 7 x 19 7 x 19 7 x 19 7 x 19 7 x 19 7 x 19 7 x 19 7 x 19 6 x 19 IWRC 6 x 19 IWRC 6 x 19 IWRC 6 x 19 IWRC 6 x 19 IWRC 6 x 19 IWRC 6 x 19 IWRC 6 x 19 IWRC 6 x 19 IWRC 6 x 19 IWRC 6 x 19 IWRC 0.006 0.008 0.010 0.010 0.012 0.012 0.014 0.016 0.018 0.018 0.018 0.020 0.022 0.024 0.026 0.030 0.033 0.036 0.039 0.045 0.048 0.050 0.054 0.057 0.060 0.062 0.006 0.008 0.009 0.009 0.010 0.010 0.011 0.017 0.019 0.020 0.021 0.023 0.024 0.025 0.027 0.030 0.033 0.036 0.039 0.045 0.048 0.050 0.054 0.057 0.060 0.062 110 270 480 480 920 1,000 2,000 2,800 4,200 5,600 7,000 8,000 9,800 12,500 14,400 17,600 22,800 28,500 35,000 49,600 66,500 85,400 106,400 129,400 153,600 180,500 110 270 480 480 920 920 1,760 2,400 3,700 5,000 6,400 7,800 9,000 12,000 16,300 22,800 28,500 35,000 49,600 66,500 85,400 106,400 129,400 153,600 180,500 360 700 1,300 2,000 2,900 3,800 4,900 6,100 7,600 11,000 14,900 19,300 24,300 30,100 42,900 58,000 75,200 is caused by friction between strands and be tween wires. In bare cable, this is aggravated by dirt and grit working its way into the cable; and the lubricant working its way out leaving dry, dirty wires rubbing against each other. In long, straight runs of cable, vibration work- hardens the wires causing the brittle wires to fracture with eventual failure of the cable. c. The nylon-jacket protects the cable in a threefold manner. It keeps the lubricant from oozing out and evaporating, it keeps dirt and grit out, and it dampens the vibrations, thereby, greatly reducing their effect on the ca ble. 7-144. NONFLEXIBLE CABLES. (Refer to table 7-4 and figure 7-9.) Nonflexible, pre formed, carbon steel cables, MIL-W-87161, composition A, are manufactured by the same processes as MIL-W-83420, composition B, flexible corrosion-resistant steel cables. The nonflexible steel cables are of the 1 by 7 (Type I) or 1 by 19 (Type II) construction ac cording to the diameter as specified in ta Page 7-28 Par 7-143 ble 7-4. The 1 by 7 cable consists of sixPDF Image | AFS-640
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