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This construction of wire rope is used where ropes are dragged on the ground or over rollers, and resistance to wear and abrasion are important factors. Given the excellent spooling characteristics and ease of splicing this makes sandline the perfect choice for swab rigs and workover rigs. The wires are quite large and will stand a great deal of wear. In fact, this construction is sometimes called "coarse laid" because of the large wires. The 6x7 classification is a stiff rope and needs sheaves and drums of large size. It will not withstand bending stresses as well as ropes with smaller wires, with the resulting higher percentage of load carried by each wire, a larger factor of safety should be considered with 6x7 cables that with cables having a larger number of wires.
Mercy Diagnostics
