Shearing machine for trimming flat material particularly sheets and strips of metal

A shearing machine for trimming flat material, particularly sheets and strips of metal, the shearing machine comprising a pair of spaced apart rotary blade shears, each rotary blade shear having an upper blade housing and a lower blade housing, and rotary blade shafts with rotary blades mounted in the upper blade housing and the lower blade housing, further comprising a transverse eccentric connecting the upper blade housing and the lower blade housing for adjusting a blade gap and a blade overlap in dependence of a material thickness and a material strength, further comprising a center cut shear having a movable upper blade housing and lower blade housing and rotary blade shafts with rotary blades mounted in the upper blade housing and the lower blade housing of the center cut shear, a frame supporting the center cut shear and a blade gap adjusting device with a reversible transverse eccentric mounted between the frame and the rotary blade of the rotary blade shaft of the upper blade housing of the center cut shear, wherein the reversible transverse eccentric is connected to an end of the upper blade housing of the center cut shear adjacent the rotary blades thereof, wherein the frame of the center cut shear is vertically adjustably mounted in an outer frame.