Braided in bundles

Cores wound in bundles for a longer service life

chainflex® cables or cables with at least 12 cores are always designed with cores wound in bundles. This elaborate stranding ensures a longer service life with continuous movement in energy chains.

What are cores wound in bundles? In multi-core energy chain cables that are wound in layers, corkscrews and core breaks can occur. Cores wound in bundles eliminate these problems thanks to the very complex, multi-stranded interior. Here, the stranded wires are first twisted with a special pitch length and the resulting cores are twisted again to form single core bundles. In the case of large cross sections, a strain relief element is located in the middle. In the next step these core bundles are re-stranded around a tension-resistant centre, i.e. a real core element.

This multiple stranding of the cores means that all cores change the inner and outer radius of the bent cable several times at the same distance. Tensile and compression forces are thus equalised around the core element. With its high tensile strength, it gives the stranded structure the necessary internal stability. This ensures that the stranding remains strong even under the highest bending stress.