outwardly good appearance, but with a dry powdery heart or core, has -not been properly maintained and should be treated with caution. Effect of Extreme Cold: When subjected to extreme cold a wire rope may become brittle and lose its flexibility, and an apparently sound rope may part without warning. The brittleness is not permanent and the rope will regain its resilience in a normal temperature, but the potential danger should be remembered when working wires in very cold climates. Testing of Steel Wire Rope The wire from which the rope is to be made is tested before manufacture of the rope to ensure it complies with the relevant Standards with regard to tensile strength, torsion and galvanising properties. After manufacture of each production length of rope, test samples are cut from the finished rope and strand. These samples are used for a tensile test to destruction, tests of preforming of the rope, and tests on a mixture of the individual wires with regard to diameter, tensile strength, torsion and quality of galvanising. Each coil of wire is accompanied by a certificate of conformity and a test certificate showing the guaranteed minimum breaking strength of the wire. (WHEN NEW.) General Remarks on Steel Wire Rope How to Measure the Size of a Rope The size of a wire rope is the diameter in millimetres of a true circle, which will just enclose all the strands. Measure at each of three places at least 2m apart. The average of these measurements is to be taken as the diameter of the rope. Sheaves for Wire Rope
outwardly good appearance, but with a dry powdery heart or core, has -not been properly maintained and should be treated with caution. Effect of Extreme Cold: When subjected to extreme cold a wire rope may become brittle and lose its flexibility, and an apparently sound rope may part without warning. The brittleness is not permanent and the rope will regain its resilience in a normal temperature, but the potential danger should be remembered when working wires in very cold climates. Testing of Steel Wire Rope The wire from which the rope is to be made is tested before manufacture of the rope to ensure it complies with the relevant Standards with regard to tensile strength, torsion and galvanising properties. After manufacture of each production length of rope, test samples are cut from the finished rope and strand. These samples are used for a tensile test to destruction, tests of preforming of the rope, and tests on a mixture of the individual wires with regard to diameter, tensile strength, torsion and quality of galvanising. Each coil of wire is accompanied by a certificate of conformity and a test certificate showing the guaranteed minimum breaking strength of the wire. (WHEN NEW.) General Remarks on Steel Wire Rope How to Measure the Size of a Rope The size of a wire rope is the diameter in millimetres of a true circle, which will just enclose all the strands. Measure at each of three places at least 2m apart. The average of these measurements is to be taken as the diameter of the rope. Sheaves for Wire Rope