Abstract: Apparatus for production of yarn from natural or chemical fibres comprising a fixed annular chamber having opposite ends with a closure member at one of the ends having a duct therein for discharge of yarn. A suction pipe is introduced into the chamber at the other of its ends and a helical duct is formed between the outer surface of the suction pipe and the inner surface of the chamber through which air is introduced into the chamber in a helical whirl. A duct is disposed between the closure member and the suction pipe for introducing raw material into the chamber.