wavy wire rope for sale

Jakob Rope SystemsJakob Rope Systems is one of the market leaders in the manufacture and supply of top-end, design-forward solutions to industrial and construction-related rope and cable applications in which elegance, simplicity and superlative quality are required.

Now, for more than a century and in over 55 countries, Jakob offers a range of steel rope products to our clients who return time and again seeking a reliable maker and provider of stainless steel wire ropes, rod fasteners, nets and unique fittings, all custom-designed and produced to fit exact specifications. At Jakob, we understand it’s the little details that make the big differences.

Every piece of finished goods leaving our warehouses is put through a stringent testing process to ensure compliance with AISI 316, ISO and DIN standards. Our cable railing, wire mesh, wire ropes, and rods can be used in multiple applications, both indoor and outdoor and at various scales, such as sign stanchions, shelving, as trellises on green walls, safety netting, and even in zoo enclosures.

Jakob and our USA -based team can provide cables and wire netting solutions for any commercial and business application. We take pride in offering custom-made designs to fit our clients’ needs.

Wire rope and strand is the core of the wire rope world. We carry standard stainless steel construction and specialty construction. We also carry specialty wire rope configurations like millimeter, from compacted wire rope to rotation resistant crane ropes and galvanized wire rope iwrc to fiber core wire rope. Import and USA-made available.

Wire rope will develop defects during use through several different mechanisms each of which will affect the strength of the rope and therefore limit the working life of the rope.

This is the second article of Part 2 of our Technical Series on Wire Rope Safety. Click here for an outline of the entire Technical Series on Wire Rope.

The number of wire breaks will increase steadily during the life of the rope due to several factors but primarily due to fatigue caused by the rope travelling through sheave wheels. Neither the OHS Act nor the MHSA stipulates how many wires need be broken before a wire rope is discarded. In addition to the number of wires broken, attention must be given to the position and the concentrations of wire breaks as a localized concentration, although less than the number specified, will be sufficient reason to discard.

Inspection is done by first visually inspecting the full length of the rope. In some cases it can be helpful to spool the rope slowly through the hand. Special attention has to be paid and strong protective gloves must be worn. A soft cotton or similar type cloth held against a moving rope will be caught by protruding ends and thus detect the broken wires.

The detection of broken wires in the strand valleys is important but can be difficult. The use of a wire brush on a dirty, heavily lubricated rope can loosen, but not always remove old lubricant and the brush may have to be cleaned frequently with a solvent. Where solvents are used to clean the rope surface, they should be used sparingly and the rope section should be thoroughly lubricated afterwards.

Reduction in diameter can be caused by abrasion, corrosion or a local failure of the rope core. It is recommended that a wire rope should be discarded when the rope diameter anywhere is reduced to 90 % of the nominal diameter.

Corrosion may be external or internal, general or localized. It is recommended that a wire rope should be discarded when the surface of the wires is severely roughened or pitted, or if the wires are slack within the strands due to wastage.

This deformation, while it may not necessarily affect the strength of the rope, can transmit pulsation and produce uneven rope wear. When the rope is laid on a level surface under no load, the maximum height of the “wave” should not be greater than the nominal rope diameter + 1/3, otherwise the rope should be removed from service.

A birdcage develops when the outer layer of strands becomes longer than the inner layer or layers. The condition may occur as a result of incorrect fitting, tight sheaves, shock loading, incorrect use of a swivel or the application of a heavy load to a new rope before the strands have settled into position. Ropes with a birdcage should be discarded.

A local increase in rope diameter with the core easily visible between several covering strands can be caused by shock loading or, in the case of fibre main core ropes, by the absorption of moisture. A node is a justification for discard.

Deformation caused by a loop in a rope being tightened when the rope cannot rotate about its axis to release the torque. The tight bend or kink thus formed can result in a serious loss of strength due to unbalance in the lay lengths. Ropes with kinks must be discarded.

Shortly after the new bridge was commissioned in February Maine Department of Transportation officials noticed the lifts pan"s wire cables were experiencing a condition officials are calling “wavy ropes.” DOT press secretary Ted Talbot said the condition does not affect the operation of the bridge but will expedite the replacement of the cables before their 25-year lifespan is up.

“The contractor, the operating rope manufacturer, the machinery supplier and the engineer of record have all inspected the wire ropes and the lift span"s operating system. This condition does not result in a loss of strength or impact the normal safe operation of the bridge,” Talbot said. “However, due to the ‘wavy rope" condition, it is MDOT"s understanding that normal and expected wear of the ropes will be accelerated. As a result, replacement of the operating ropes will likely need to occur sooner than the expected 25-year life."

Talbot said MDOT will continue to monitor the condition and will order an additional set of operating ropes in the near future to have available for installation at a later date when determined to be necessary.