Stromag India Pvt. Ltd. Manufactures Flexible TRI-R Couplings. Stromag India Pvt. Ltd. Is a DIN ISO 9001 certified company. Flexible TRI-R Couplings are highly flexible rubber couplings suitable for diesel engine drives. The series covers a nominal torque range from 1150 Nm up to 20000 Nm; its connection dimensions comply with the SAE-standard. Due to the torsional and radial flexibility of the ring element and the axial flexibility of the diaphragm, the Flexible TRI-R Coupling is suitable for applications with resiliently mounted drives. It allows selecting suitable coupling for every drive subject to torsional vibrations.