The stator temperature of the oil-free air compressor is set below 35℃ or 40℃. This is the specified temperature when the machine is working and cannot be changed. The core of oil-free air compressor is excellent secondary compressor. After 20 processes of finishing, the rotor profile has achieved unparalleled accuracy and durability. High-quality bearings and precision gears are installed inside to ensure the coaxiality of the rotor, make the rotor fit accurately and maintain long-term efficient and reliable operation.