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RUPEX Pin and Bush Coupling: Robust, damping for harsh industrial drives with high torque capacity.
The RUPEX Pin and Bush Coupling, developed by Flender, is a robust, flexible compensating coupling engineered for medium to high torque industrial applications, excelling in harsh operating conditions[
Constructed with high-quality components, the coupling consists of two hub sections mounted on machine shafts, connected positively by steel pins and elastomer buffers[1][9]. It is available in 26 sizes, covering an impressive nominal torque range from 200 Nm to 1,690,000 Nm, and operates efficiently in temperatures from -30 °C to +80 °C—extendable to -50 °C to +100 °C with alternative elastomer elements[2][5]. Hubs are available in grey cast iron or steel variants, with optional add-on parts like brake disks or drums for enhanced functionality[3][9].
A core advantage is its ability to compensate for shaft misalignment with weak restorative forces, while the barrel-shaped buffers simplify plug-in assembly and ensure low circumferential backlash[1][5]. It requires minimal ma
Certified to comply with the ATEX directive (2014/34/EU), the coupling is suitable for potentially explosive atmospheres, expanding its application scope to high-risk industries
Common applications span mining, cement, steel production, oil and gas, and power generation, including conveyor belts, tube mills, crushers, pumps, fans, and crane hoisting systems
RUPEX® couplings are used as flexible compensating couplings in all applications requiring a reliable transmission of torque under harsh operating conditions. The conical seats of the buffer pins facilitate mounting and guarantee maintenance-free operation. The optimized shape of the barreled buffers allows simple plug-in assembly and low circumferential backlash. Many type variants are offered, e.g., with brake disk, axial play limiting device or brake motor couplings.
