The fundamental difference between non-rotating wire ropes and rotating wire ropes lies in their structural design, rotational characteristics after being subjected to force, stability of use, and applicable working conditions. Rotating wire ropes, also known as the common wire ropes we often see, mostly adopt a single-layer strand structure, such as 6×19, 6×37, etc., which are classic structures. All the wire strands are twisted in the same direction. When subjected to tension, a uniform rotational torque will be generated inside the wire rope. Once the hook or the heavy object is in a free suspension state, the wire rope will rotate, loosen the strands, and even knot, and the heavy object will also rotate along with it. This not only affects the safety of hoisting but also easily damages the internal steel wires of the wire rope, reducing its service life. The advantage of this type of wire rope is its simple structure, mature production process, relatively soft texture, good bending performance, lower cost, and suitability for use in multi-rope pulley systems, short-distance traction, bundling, and ordinary working conditions where strict rotation requirements are not necessary. Because when multiple wire ropes are subjected to force simultaneously, the rotational tendencies can cancel each other out, and there will be no obvious self-rotation problem. 

And the non-rotating steel wire rope, also known as anti-rotation or anti-twisting steel wire rope, is designed to overcome the rotation problem. To achieve this, a multi-layer strand with reverse twisting structure is adopted. Common models include 18×7, 19×7, 35W×7, etc. The twisting direction of the inner and outer strands is completely opposite. When the steel wire rope is subjected to tension, the torsional moments generated by the inner and outer layers will cancel each other out, thus preventing free rotation from a principle perspective. During the lifting process, the heavy object remains stable without spinning, making it safer. There will also be no cases of loose strands or twisting. At the same time, non-rotating steel wire ropes mostly adopt a steel core structure, which has a higher density. The breaking tension under the same diameter is higher than that of ordinary rotating steel wire ropes, and the wear resistance is also stronger. They are suitable for scenarios such as single-rope vertical lifting, high-altitude hoisting, tower crane operations, deep well lifting, and long-distance traction, where high stability is required. However, due to a more complex structure and greater manufacturing difficulty, the price of non-rotating steel wire ropes is higher. Their flexibility is slightly lower than that of ordinary rotating steel wire ropes. The friction between the internal steel wires is relatively greater. During use, they cannot be forcibly twisted in the opposite direction; oth