Rotork IQ3MOD1B Center Column and Worm Wheel Assembly

Rotork IQ3MOD1B Center Column and Worm Wheel Assembly is a Rotork spare-part kit for IQ3 electric intelligent actuators, pairing the center column with the worm wheel (and associated gearcase components) to form the core gear train that drives valve stems. Used inside the IQ3 gearcase, it is configured for models in the IQ70–IQ95 range with a 15:1 gear ratio to enable precise control of valve operation. Online listings for IQ3MOD1B show actuator-size–dependent RPM values, including 57 RPM for IQ19 configurations and 43 RPM for IQ25 configurations. This assembly is described in Rotork spare-parts documentation as including the centre column, wormshaft, wormwheel, and torque spring pack as part of a complete gearcase assembly.