Rotex Spider - Purple ROTEX couplings are torsionally flexible and designed for positive torque transmission. They are fail-safe. Operational vibrations and shocks are efficiently dampened and reduced. The two congruent coupling halves with concave claws on the inside are peripherally offset in relation to one another by half a pitch. In addition, they are designed in such a way as to enable an involute spider to be located between them. The teeth of the spider are crowned to avoid edge pressure if the shafts are misaligned. ROTEX couplings are capable of compensating for axial, radial and angular displacements of the shafts to be connected. From the visual point of view we have characterised the material T-PUR by the colours orange (92 Shore A), purple (98 Shore A). (Please note: When ordering you will need two hubs and one spider as these are sold as separate items).