Rated at 16-14 ga. mild steel, this machine should not have a problem with .125 aluminum as long as it is not aircraft type hardened. It will cut from a 5" to 48 " ring/circle. As you can see, it is definitely an overbuilt machine. It also sits on a nicely castered base which makes it good to roll out of the way when not in use. Runs on 220/440 volt 3 phase. Call with questions.