The wire rope is the only component between your load and gravity, and it is a consumable — every crane is re-roped several times in its life. This guide covers what crane wire rope actually is, the requirements specific to cranes, exactly when a rope must be scrapped, and the rules for replacing one.e only component between your load and gravity, and it is a consumable — every crane is re-roped several times in its life. This guide covers what crane wire rope actually is, the requirements specific to cranes, exactly when a rope must be scrapped, and the rules for replacing one.

Types, construction and uses of steel wire rope

The type, construction, raw material and manufacturing process of a wire rope all depend on its application. General-purpose steel wire ropes are made from carbon-steel wires of 0.1 to 6.0 mm diameter with a circular section. When twisting sealed and semi-sealed ropes, Z-shaped and other special-shaped wires are used. To increase safety and reliability, ropes are also made with coated steel wires, stainless-steel wires and bimetallic steel wires.

Ropes are classified by purpose: suspension-bridge ropes, mine ropes, aerial-cableway ropes, traction ropes for transmission devices, elevator ropes, and ropes for bundling and dragging goods, among others — and the range keeps growing as constructions become more complex. Whatever the type, a crane rope must have sufficient strength, good flexibility, a compact and even lay, and resistance to wear and crushing. The exact construction and diameter for your crane are stated on its GA drawing and spare-parts list; order against that, using the crane number from the nameplate.

Three requirements specific to crane ropes

1. Rotation-resistant (left–right) lay

Crane hoisting ropes use a left–right (regular / lang's combination) lay so that a freely suspended load does not spin and the rope does not loosen under load. Every rope must be supplied with its quality certificate.

2. Heat-resistant rope for hot metal

Ropes lifting or transporting hot or molten metal must use a heat-resistant rope (fire-resistant core) instead of a standard fibre-core rope, which dries, chars and collapses. This is standard practice on our metallurgical cranes.

3. No joints in hoisting and luffing

The hoisting and luffing mechanisms must run a continuous rope with no joints. Where a connection is unavoidable elsewhere, its strength must be at least 90% of the rope's breaking force, and it must not pass over a sheave or onto the drum.

When should a crane wire rope be scrapped?

Scrap the rope when it meets any one of the following conditions:

Build the check into your routine using the overhead crane inspection checklist; for service-life context see how long a crane wire rope lasts.

Replacing a crane wire rope — key points

Match the replacement to the original specification. If a rope of different diameter must be used, the difference from the original should not exceed 1 mm when the original diameter is 20 mm or less, or 1.5 mm when the original is over 20 mm. A rope that is too thick rubs against itself as it winds onto the drum and wears faster. When replacing or spooling, never let the rope kink — practice proves a kinked rope is the most likely to wear through and break in service. Connecting two steel wire ropes together in a hoisting mechanism is forbidden.

If the drum, hoist or trolley is as worn as the rope, re-roping alone is a false economy — see crane modernization & retrofit.

Ordering a replacement rope

Send the crane number from the nameplate (or a photo of the old rope's tag) to [email protected] — matched replacement ropes are a stock item and ship fast. Our ropes carry various characteristics suited to heavy lifting and demanding service; more on rope care and selection: wire rope solutions: expert workshop advice.