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62 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Wire Rope Clips Table 2, Wire rope clips generally to EN 13411-5 Type A, required number and torque value The efficiency of a wire rope termination made with wire rope clips will depend on the correct placement on the ropes and on the care and skill of the fitting and tightening of the clips. With inadequately tightened nuts or with an insufficient number of wire rope clips the rope end may slide through the clips at a very early stage in loading. A number of factors can adversely affect the tightness of the clips on ropes, such as: - the nut may be tight on the thread, yet not tight against the bridge; - contamination of the thread by dirt, oil or corrosion products, which may prevent the correct tightening of the nut. Forged wire rope clips provide greater bearing surface and more consistent strength than malleable cast iron clips. Suitable use of wire rope clips to EN13411-5 standards include suspending static loads and single use lifting operations which have been assessed by a competent person taking into account appropriate safety factors. Wire rope clips should not be used on the following applications: • hoist ropes in mines; • rope drives for cranes in steel works and rolling mills; • permanent fastening of ropes in other rope drives; • rope terminations for load suspension devices in the operation of lifting appliances except in the case of lifting tackles where these are produced for a special application and are not re-used. It is required that the products are regularly inspected and that the inspection should take place in accordance with the safety standards given in the country of use. This is required because the products in use may be affec- ted by wear, misuse, overloading etc. with a consequence of deformation and alteration of the material structure. Inspection should take place at least every six months and even more frequently when the products are used in severe operating conditions. diameter min. no torque torque wire of clips value value rope required mm Nm Ft.Lbs 5 3 2 1.5 6.5 3 3.5 2.6 8 4 6 4.4 10 4 9 6.6 12 4 20 14.8 13 4 33 24.3 14 4 33 24.3 16 4 49 36 19 5 68 50 22 5 107 79 26 5 147 108 30 6 212 156 34 6 296 218 40 6 363 268
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