WHEN TO USE ROTATION RESISTANT ROPES?

In every wire rope, the helicoidal structure of wires and strands generates torque once the load is lifted. In non- rotation resistant wire rope, the torque is unidirectional as all wires and strands are laid in the same direction. Hence the rope will start to rotate around its longitudinal axis trying to eliminate the torque. In multiple falls and great lifting heights, the torque would eventually cause the hook block to twist.

The working principle of rotation resistant wire rope lies in balancing the torque by means of opposite lay directions of the core and the outer strands. Therefore, in a right hand rope the core is laid left while the outer strands are right lay and vice versa.

Once the load is lifted, the torque generated by the outer lay is eliminated by the torque generated by the inner lay. The rope is stable and will not, or to a very low extent, rotate around its axis.

ROTATIONAL BEHAVIOUR

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All PYTHON rotation resistant rope constructions exceed above given classification by far over a wide load spectrum, making them first choice for applications demanding highly rotation resistant wire rope.

LAY TYPE RECOMMENDATIONS

Depending on the drum type, we recommend the following lay types for PYTHON rope constructions:

Rotation resistant PYTHON ropes (may work with a swivel)

Non-rotation resistant PYTHON ropes (must not work with a swivel)