Wire Rope

  • A Wire Rope Is a “Machine” With Many Moving Parts
  • Wire Rope Constructions/Classification
  • Wire Rope Classifications
  • High Performance Ropes & Rotation Resistant
  • Aircraft Cable
  • Metric Wire Rope & Swaged Wire Rope

A Wire Rope Is a “Machine” With Many Moving Parts

Wire Rope

The greatest differences in wire ropes are found in the strands, which may vary widely in the pattern and number of wires which are laid together. The wires of the rope may be made of various metals, including steel, iron, stainless steel, monel, and bronze. The material of which the wires are made is the primary determinant of rope strength. By far the most widely used metal is high-carbon steel. Carbon steel wire ropes come in various Grades. The term “Grade” is used to designate the Nominal Strength of the wire rope. The most common rope Grades are Traction Steel (TS), Plow Steel (PS), Improved Plow Steel (IPS), Extra Improved Plow Steel (EIPS), and Extra Extra Improved Plow Steel (EEIPS). One cannot determine the Grade of a wire rope by its feel or appearance. To properly evaluate a rope system you must obtain the Grade from your employer or wire rope supplier. A wire rope is a machine, by dictionary definition: “An assemblage of parts that transmit forces, motion and energy one to another in some predetermined manner and to some desired end.”

wire rope

A typical wire rope may contain dozens – even hundreds – of individual wires which are formed and fabricated to operate at close bearing tolerances one to another. When a wire rope bends, each of its many wires slides and adjusts in the bend to accommodate the difference in length between the inside and the outside of the bend. The sharper the bend, the greater the movement. Every wire rope has three basic component s : (1) The wi res which form the strands and collectively provide rope strength; (2) The strands, which are laid helically around the core; and, (3) The core, which forms a foundation for the strands. The core may be either a Fibre Core (FC), an Independent Wire Rope Core (IWRC), which is actually a smaller wire rope, or a strand similar to the outer strands of the rope; only an IWRC or strand core contributes strength to the rope; and an IWRC normally provides only 7 1/2 % of the wire rope Breaking Strength.

Wire Rope Constructions/Classification

SEALE CONSTRUCTION

SEALE CONSTRUCTION

Two layers of wires are formed around a centre wire, with each layer having an equal number of wires. The large outer wires, specifically designed for increased abrasion resistance, are resting in the valleys between the small inner wires.


FILLER CONSTRUCTION

FILLER CONSTRUCTION

Small filler wires, equal in number to the main inner wires, are used to prevent the outer wires from being pressed into the valley between the inner wires. Due to good abrasion and fatigue resistance characteristics, this construction has become most popular for general purpose wire ropes under the 6 x 19 classification.


WARRINGTON CONSTRUCTION

WARRINGTON CONSTRUCTION

The outer layer of wires are composed of alternating large and small wires, formed around a layer of uniform-sized wires. The smaller outer wires rest on the crowns, and the larger ones in the valleys of the inner wires.



WARRINGTON SEALE CONSTRUCTION

WARRINGTON SEALE CONSTRUCTION

A combination of Seale and Warrington Constructions, it features large outer wires with the main inner layer being composed of alternating large and small wires.

ROTATION RESISTANT

ROTATION RESISTANT

Rotation resistant ropes are a special category (class) of wire rope designed to resist the tendency to spin or rotate under load. In general these ropes are used as single part lines, or in situations where operating conditions require a rope that will resist cabling in a multipart system. The essential nature of rotation resistant rope designs impose certain limitations on their application and necessitate special handling requirements not encountered with other rope constructions. Rotation resistant ropes are available in two general classifications: 1) Single Layer, 2) Multilayer strands.


COMPACTED STRAND WIRE ROPE

COMPACTED STRAND WIRE ROPE

Manufactured from strands which have been compacted or reduced in diameter prior to laying strands around the core into a finished wire rope. The compacting process flattens the surface of the outer wires and reforms internal wires of the strand to increase the metallic area of the strand producing a smoother outer surface and increased strength over round strand rope of the same diameter and classification.


CABLE LAID ROPE

CABLE LAID ROPE

The rope is machine formed by laying six wire ropes in a helical pattern around a core rope. Ideal for use as basket or choker hitches, where flexibility and ease of handling are essential and cutting or abrasion is not a critical factor.

Wire Rope Classifications

6 x 19
(Includes 6 x 19 Seale, 6 x 21, 6 x 25, 6 x 26 types)


6x19 xsections 6 by 19 wire rope classifications

6 x 37
(includes 6 x 31, 6 x 36, 6 x 41, 6 x 43 types)


6x37 xsections 6x37 wire rope classifications
High Performance Ropes
rotation resistant
aircraft cable 7x19
aircraft cable 7x7

†1/32 is made in 3x7 construction

Disclaimer - NOT FOR AIRCRAFT USE.

metric wire rope
swaged wire rope