Automatic, pneumatic heel screwing machine with screw and thermoplastic. Features of model 80 FA are the hinged stand-jack that makes easy the introduction of the boot, the screw feeding arm self-centering on the pin, the possibility to have two screws of different lengths in the feeder and the serial balance fixing, that stroke down in low pressure. The machine can be equipped with different types of fixing device or optional in order to meet every need the modern heel fashion requires. This machine complies with accident prevention regulations and industrial health.