Rotation Resistance and Low Torque Wire Rope

A common problem with using wire rope is rotation. Comcoming this issue requires that rotation resistant wire ropes be employed. Standard cable can twist and turn when handling a load, and so special considerations must be made when constructing rotation resistant wire ropes. These ropes are Contra-helically laid, and they are designed to lessen the torque on lines. As rotation resistance increases, other characteristics of wire rope begin to suffer. Specialized wire ropes must be treated and maintained properly.wire rope

There are several standard types of rotation resistance, which are broken down into categories. These categories are:

Category 1: has a minimum of 15 outer strands with three layers over the center. It has almost no tendency to rotate, and when it is guided, it will transmit little torque.

Category 2: has ten or more strands and two or more over the center. These ropes have substantial resistance to rotation.

Category 3: has nine or less outside strands and two more layers over a center. This version has a limited amount of resistance against rotation. Do not use category three ropes with a swivel.

For more information on wire ropes or rigging supplies, let Bilco be your first call.

 

RELATED READING:

  • Protecting Wire Rope
    If you want your wire rope to work efficiently and last long, you will need to keep up with maintenance and ensure proper installation.
  • FAQ: Cables and Wire Rope
    Simply put, wire rope is made of many steel wires that are wound around each other. The mass of wound wires forms a helical shape, which creates the strength of the rope.
  • Different Constructions of Wire Rope
    If you are interested in learning more about wire rope, the different types of designs, or how the product is used, contact Bilco wire rope for more information and facts!

Design of Wire Rope | Wire Rope in the Ski Industry |  Hoist and Lift with Crane Wire Ropes | Using Wire Rope Thimbles | Three Important Aspects of Purchasing Wire Rope | Pre-installation Check List for Wire Ropes | Identifying Wire Ropes | Wire Rope and Corrosion Resistance | Storing Wire Ropes | Maintaining Steel Wire RopeWire Rope Can Be Found All Over | When Should You Remove Crane Wire Rope? |  Choosing Wire Rope | Wire Rope Inspections | Diagnostic Guide for Wire Rope Degradation  | Basic Properties of Wire Rope