What is the difference between non-rotating wire rope and rotating wire rope?

The core difference between non-rotating and rotating wire ropes lies in their structural design and resistance to rotation

Release Time:

2025-07-02

The core difference between non-rotating and rotating wire ropes lies in their structural design and resistance to rotation: the former uses multi-layer reverse twisting or special strand structures to offset torque, suitable for scenarios requiring stable lifting; the latter, with a conventional single-layer twisting structure, is prone to rotation and is suitable for general hoisting operations.

Structural Feature Differences

Twisting Process
Non-rotating wire rope: Uses multi-layer reverse twisting (such as 35×7 structure), with the inner and outer layers twisted in opposite directions, achieving anti-rotation through torque offset.
Rotating wire rope: Single-layer strands twisted in the same direction (such as 6×29 structure), unable to offset the rotational force generated by internal stress.
Strand Design
Non-rotating type: Mostly uses surface contact or special strands (such as fan-shaped, triangular strands), increasing the contact area to disperse stress.
Ordinary type: Round strand point/line contact structure, prone to self-rotation due to stress concentration.
Comparison of Anti-rotation Principles

Torque Balancing Mechanism: Non-rotating wire ropes achieve torque balance through reverse twisting of the inner and outer layers, resulting in a net torque close to zero; ordinary wire ropes, due to single-layer same-direction twisting, lead to the superposition of residual torque.
Stress Release Design: High-end non-rotating wire ropes (such as the CASAR series) have a plastic layer between the steel core and the outer strands, improving structural stability and preventing internal corrosion.
Application Scenario Selection

Scenarios Prioritizing Non-rotating Wire Ropes
High-rise vertical shaft lifting (such as mine balance ropes).
Tower crane hook systems.
Long-distance traction equipment (such as port loading and unloading machines).
Scenarios Suitable for Ordinary Wire Ropes
Short-term temporary hoisting operations.
Low-load horizontal handling.

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What are the diameters of multi-layer strand non-rotating wire ropes?

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What are the diameters of multi-layer strand non-rotating wire ropes?