M43x1 on mini cnc lathe 12nm hybrid servo motor

New servo driven spindle drive is performing really well, it cuts M43x1 thread in ally with speed 300 rpm, gear ratio is 2:1 that doubles the torque, motor is a 12nm hybrid servo from China, power supply that I'm using is 36v only I'm sure that it would run much faster on recommend 80v power supply. Sorry for not answering on all the comments, I'm really busy.