In this paper an improvement is proposed in rolling cut shear which cuts work material using a circular upper blade and a straight lower blade, whereby irregularities found in conventionally sheared products such as bow, twist and camber, can be reduced drastically. In particular, the improvement comprises the inclusion of a straight counter-holding pressurizing bar in conventional rolling cut shear to reduce or eliminate the above-mentioned irregularities, which are unavoidable in a conventional guillotine-type shear, as well as the use of a simplified guide mechanism to ensure a rolling movement of the upper blade along the lower blade. The bar has not been considered for inclusion in conventional rolling cut shears because these shears have been used exclusively for cutting hot slabs of such great thicknesses that irregularities are negligible. The present experimental results, however, show that the bar can effectively eliminate or reduce dramatically the above-mentioned irregularities compared with the guillotine-type shear. Finally, a large prototype rolling cut shear intended for use in actual manufacturing is introduced.