Bomatec manufactures and assembles the magnetic return yokes for the magnetic wire rope testing devices from ROTEC GmbH in Stuttgart, Germany, entirely in-house at its site in Switzerland. The return yokes guide the magnetic flux in the sensor head and are a key component for the accuracy of wire rope inspection. They are made from soft magnetic materials designed for efficient flux guidance with minimal losses.
What does Bomatec supply specifically for ROTEC’s rope testing devices?
Bomatec produces magnetic assemblies, a field in which the company has specialized for 30 years. Rather than purchasing completed yokes and merely assembling them, Bomatec manufactures them entirely in-house, from material selection to the finished assembly. This includes the assembly process itself, which is carried out completely internally without any intermediate external supply steps.
How do ROTEC’s magnetic wire rope testers work?
ROTEC's devices operate using a sensor concept comprising a magnetic arrangement and up to 48 Hall-effect sensors that are digitized directly within the sensor head. This enables flaws in wire ropes not only to be detected, but also to be localized in three dimensions. The magnetic yoke is the component that generates the magnetic circuit, playing a decisive role in determining how efficiently and reliably the sensors can operate.
Why is assembly in Switzerland a quality advantage?
While Bomatec manufactures at multiple production sites worldwide , the yokes for ROTEC are specifically produced in Switzerland. This allows for short communication channels between engineering and manufacturing, seamless quality control at every production step, and rapid response times for design modifications. For ROTEC—and ultimately for the end-users of the testing equipment—this ensures consistently high and traceable component quality.
Where are ROTEC’s rope testing devices deployed?
The magnetic wire rope testers are used in ropeways, bridges, cranes, offshore applications, amusement rides, and mines, among other areas—anywhere the condition of wire ropes must be inspected regularly and reliably. Further technical details regarding ROTEC's magnetic wire rope testers can be found on the manufacturer's website.
What does the partnership mean for the future?
For Bomatec, the collaboration with ROTEC exemplifies how Swiss precision manufacturing and German engineering synergy advance safety-critical testing technology. Bomatec’s high vertical integration allows both companies to collaborate on new sizes and further developments—such as the "Rope Testing 4.0" concept, with which ROTEC is driving the digitalization of rope inspection. Bomatec will continue to contribute to the safety of rope applications worldwide in the future.
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Assembly step: Fit the magnetic return circuit
Detail view of the magnetic return yoke
Magnetic return yoke assembly
Protective packaging of the magnetic return yokes
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Armin Sejfic
Head of Engineering
