Non rotating Wire Ropes
PROlift® provide wire ropes to suit the requirements of your applications, including non-rotating wire ropes and special wire ropes.
Non-rotating (non-rotational) wire ropes are used in various on and offshore cranes, various machinery, winches and trolleys, in the maritime and fisheries sector, on and offshore oil exploitation, civil and industrial construction, engineering and infrastructure works, underground and surface mining, timber mining and numerous other industries and applications.
The most common constructions provided are shown below:
Rotational resistant and non-rotating properties of a wire rope increase with number of outer strands and number of layers of strands in section.
Thus, a wire rope with at least 14 outer strands and at least 3 layers is a very good non-rotating wire rope (see above rule for opposite lay’s direction of adjacent strands lays).
Wire ropes with 11-13 outer strands and 2 layers of strands have good non-rotating properties.
Wire ropes with 8-10 outer strands and 2 layers of strands have medium non-rotating properties.
Statistical, a non-rotating wire rope with 2 layers of strands and a free end, develop between 55% and 75% of minimum breaking load force, while a 3 layers strands develop between 95% and 100% of this force.
This parameter is named spinning loss factor.
For tower cranes and other larger cranes, using non-rotating wire ropes with 3 layers strands it is recommended.