Bimetallic bars which possess higher corrosion resistance and mechanical properties, it is the new kind of bimetallic bars which are better than standard bars. The bimetallic bars are more often applied in concrete construction. There are few methods which ensure a good strength of bimetallic layer bond. Hydrostatic extrusion, rotary rolling and explosive cladding are most often used methods. The simulations of the bar rolling in a three-high skew mill were carried out using the Forge2005® commercial program. Production of bimetallic bars is very difficult. One from many problems during production bimetallic bars is assurance good strength of bimetallic layer bond. The analysis of the effect of roll rotational speed on the stability of the rolling process and the strain and stress distribution has been carried out in this work.