Dörner & Helmer Katalog Ketten Seile Page 16
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Wire ropes Twisted (pounded) wire ropes: A variety of braids from pulled wires are twisted in a spiral shape around a core – fibre core (FE) or steel core (SEL). 6 x 7 + FE 7x7 The flexibility of a wire rope with the same diameter and strength depends on the number of wires used. e. g. 6 x 7 = 6 braids each with 7 strands = 42 wires – stiffer 7 x 7 = 7 braids each with 7 strands = 49 wires – more flexible For ropes with the same diameter and of the same quality, the softer the rope, the more wires are used and the thinner each individual wire. Fibre cores are stranded natural or synthetic fibre twines and form the construction basis for the wire ropes. End connections: A thimble helps ensure the prescribed safety radii and prevents wear. To ensure safety, 3 wire rope clamps must always be used. The wire rope clamp bracket must hang on the unloaded end. Wire rope clamp bracket Unloaded end Thimble Longitudinal joints: To ensure safety, at least 5 rope clamps should be used. 16
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