An ink nozzle unit is provided for an inkjet printhead. The nozzle unit includes a substrate assembly. A nozzle extends from the substrate assembly. The nozzle defines an internal nozzle chamber and an ink ejection portal through which ink supplied to the nozzle chamber can be ejected. A magnetic field generator is configured to generate a magnetic field passing though the nozzle chamber. A paddle is movably mounted within the nozzle chamber and includes at least one solenoid coil. An actuator is configured to activate the solenoid coil so that the paddle moves and ejects ink within the nozzle chamber out through the ink ejection portal.