This invention relates generally to the field of machines used to shave blocks of ice to create small ice particles or shavings for use in drinks or the like. More particularly, the invention relates to such machines which include a means to rotate a block of ice against a shaving plate or blade and a means to press the ice against the blade in the direction of the rotational axis. Even more particularly, the invention relates to such machines where the ice block is axially moved by pneumatic means so that constant pressure is exerted against the ice block during the rotational movement.