The Bare Shaft is an oil free screw compressor purposed to conform on applications with European trucks. Through its feature of an oil-free compressed air generation of up to 1550 m3/hr, the compressor can be utilized in working with various dry bulk materials. A versatile system structure for either clock or counter-clockwise drive grants it the capability of suiting trucks which have a wheelbase length reaching to 3.50 m. It can optionally be accompanied by a torque limiter, silencer, (two types of) multiplier and many more.