Tyre for UNEFLEX® coupling - Replacement of the tyre without moving the machines - Material Fabric-reinforced natural rubber (R arrangement) Assembly To assemble the Uneflex coupling, mount the hubs together with the pressure rings on the shaft ends and align the system parts. The distance between the hubs “N” must be the one indicated on the data sheet. The tyre is mounted on the coupling hubs, fitted to provide the smallest possible gap between its faces. For large couplings, before tightening the pressure rings, it is recommended to use clamping bands to fit the tyre. The tyre is secured with the prescribed wrench torque by means of the pressure ring and the screws The fixation must be always carried out tightening two diametrally opposite screws in cyclic order, retightening the bolts after the first tightening as the rubber settles. For replacing the tyre, only loosen the screws, until the tyre can be withdrawn.