Minimum Breaking Strength (Pounds) Nominal diameter of wire rope cable 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 Construction Tolerance on diameter  (plus only) Allowable increase of diameter  at cut end MIL-W-83420  COMP B (CRES) POUNDS MIL-W-83420  COMP A POUNDS MIL-C-18375  (CRES) POUNDS 110 270 480 480 920 1,000 2,000 2,800 4,200 5,000 6,400 7,800 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 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 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 3 x 7 7 x 7 7 x 7 7 x 19 7 x 7 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 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 INCHES INCHES INCHES Figure 2-71.  Flexible cable construction. reveals internal broken strands not readily apparent from the  outside.  [Figure 2-72] Pulleys are used to guide cables and also to change the direction  of cable movement. Pulley bearings are sealed and need no  lubrication other than the lubrication done at the factory.  Brackets fastened to the structure of the aircraft support the  pulleys. Cables passing over pulleys are kept in place by guards. The guards are close fitting to prevent jamming or  to prevent the cables from slipping off when they slacken  due to temperature variations. Pulleys should be examined to  ensure proper lubrication; smooth rotation and freedom from  abnormal cable wear patterns which can provide an indication  of other problems in the cable system.  [Figure 2-73] Cable System Installation Cable Guides 2-43 Figure 2-72.  Cable inspection technique.