AR TRASCO spider

Elastic element for SIT TRASCO couplings, equivalent to ROTEX spiders of the same size. It fits between the two hubs, transmits the torque and damps vibration and small misalignments.

There are two hardnesses in the list: the yellow one, 92 Shore A, more flexible, and the red one, 98 Shore A, which transmits more torque with less twist. As a reference, in size 42/55 the yellow one takes 265 Nm rated and the red one 450 Nm.

Choose the same size as the hubs. The table in the attached catalogue gives the torque for each size and the right size for each IEC motor.

Source: SIT TRASCO Couplings technical catalogue, 2021.