Delete the start of one of your noises and play with the pitch again. To simulate a machine, collect a variety of short, pitch-shifted, unvoiced sounds. Edit them together, copy them all, and paste them as multiple loops. This rhythmic repetition can then be pitch-bent, to make the machine start up or slow down. Add some flanging for a nice rotary motion.
Equalization helps turn a vocal sound into something less than human.
Try dips around 1.75kHz for unvoiced sounds, and around 300Hz for the voiced ones, before you start playing with the ends of the band. Machine sounds frequently benefit from a few sharp peaks between 500Hz and 1.5kHz. The final touch is to combine a few sounds in sync with the picture. The eye is very good at fooling the ear, and even a marginal vocal simulation is helped by seeing what it's supposed to be. Two Premiere format plug-ins can help the desktop sound effects artist go where no mouth has gone before.