New generation of safety couplings combines robustness, compact design and ease of maintenance

Wörth am Main, February 2026 – With the ST5, R+W Antriebselemente introduces a new safety coupling that combines high operational reliability, a compact design and precise torque limitation. The coupling reliably protects drive systems against overload while ensuring smooth, low-vibration operation. This makes it a high-performance solution for demanding industrial and heavy-duty applications.

Precise disengagement and vibration damping
The ST5 is equipped with specially developed elastomer elements and safety modules that enable highly accurate torque disengagement. In the event of an overload, the disengagement segments reliably separate the driving and driven sides, preventing damage to the machine. The disengagement torque is factory-preset by the manufacturer and can be subsequently adjusted by the system operator to meet specific application requirements if necessary. At the same time, the elastic rubber elements damp vibrations and oscillations, ensuring smooth operation even under fluctuating loads.

Thanks to the integrated mounting flange of the safety coupling, the additional intermediate flange normally required is no longer necessary. As a result, weight and mass moment of inertia are reduced by up to 40 percent. The coupling is characterized by a high level of service friendliness, as pins and elastomer elements can be easily replaced while installed. Its highly elastic design reliably compensates for radial, axial and angular misalignments.

Designed for the highest demands
The ST5 covers torque ranges from 200 to 40,000 newton meters at speeds of up to 8,500 revolutions per minute. In addition, the elastic pin coupling is also available as a shaft-to-shaft connection without mechanical torque limitation. This makes the system suitable for a wide variety of applications, including mining and tunneling, extrusion systems in the plastics and food industries, shredding systems, and customer-specific special applications in the heavy-duty sector.