Oil-free piston air compressor with a coaxial drive from an asynchronous electric motor is designed to provide equipment, devices and tools used for industrial and domestic purposes with oil-free compressed atmospheric air . The innovative mechanism of the opposed cylinder-piston group developed jointly with the Italian company Gentilin in combination with the braced structure of the "double piston" helped to solve one of the most important problems of piston mechanisms due to a crank drive - practically eliminating lateral so-called "Tangential" forces acting on the piston during its movement - the main cause of wear on the cylinder walls, what allowed to refuse lubrication without any damage to reliability.