Abstract: An operator for a casement window is disclosed which includes a hub that frictionally receives a spindle. The hub is pivotally connected to a proximal end of a pivoting handle. The hub is disposed within a cavity that extends through the proximal end of the handle and terminates at a back wall. The cavity partially accommodates a biasing element, an actuator and the hub. The biasing element is disposed between the actuator and the back wall and biases the actuator towards the hub. The hub includes at least one open position recess and open position protrusion and the actuator includes a complementary protrusion and a recess wherein the protrusion is received in the at least one open position recess of the hub and the recess of the actuator receives the at least one open position protrusion of the hub when the handle is pivoted to the open position.