Spiral mixer with fixed bowl. Thick steel structure. Bowl, breaking bar and safety guard made of stainless steel AISI 304. Stainless steel AISI 431 spiral. Head cover anti U.V., ABS material. Double timers for times working setting (one for each speed) and automatic speed changing from the first to the second speed. Automatic stop of the machine. Jogging button for the bowl rotation in order to simplify the discharge of the dough. Reverse bowl rotation selector (only at first speed). Motion trasmission by pulleys and V belts. Overload motor protection. The machine is supplied with fixed back wheels and front castors with blocking feet during the production cycle.