Constructions

The following are standard constructions available.
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Strand

Multiple wires that are laid together helically and symmetrically arranged with uniform pitch or lay.

1X3  simple construction of three single wires

1x3

A simple construction of three single wires twisted together. This construction makes it a very flexible strand in small diameters. The strand becomes less flexible as diameters increase.
1x7 Six wires are laid around one center wire

1x7

Six wires are laid around one center wire. This strand is more flexible than a 1×3. This construction is commonly used for push-pull applications and for conductive needs with low flexibility.
1x19 Twelve wires are laid around a 1x7 center

1x19

Twelve wires are laid around a 1×7 center. This construction is used for more flexible needs than a 1×7 in push-pull and conductive applications. A 1×19 strand is almost as high a breaking strength as a 1×7 strand with the same diameter.

Cable

Multiple strands that are laid together helically and symmetrically arranged in multiple layers with uniform pitch or lay.

3x7 A combination of three 1x7 strands twisted together

3x7

A combination of three 1×7 strands twisted together. This is a very flexible cable in small diameters.
7x3  This cable is used for application requiring a smooth jacket

7x3

Six 1×3 strands cabled around a 1×3 center strand. The properties of this cable are the same as a 3×7 cable but is a much smoother cable on the outside. This cable is used for application requiring a smooth jacket but it is more costly than a 3×7 cable.
7x7 This is the most standard cable construction

7x7

Six 1×7 outside strands are cabled around a 1×7 strand center. This is the most standard cable construction. This produces a very flexible cable with good cycle life and excellent breaking strength.
7x19 most flexible standard construction

7x19

Six 1×19 strands are cabled around a 1×19 center strand. This is the most flexible standard construction for cable. This cable gives you a high cycle life but has a lower breaking strength and is more costly than a 7×7 cable.
cable_chart

Strand and cable material types and their applications.