A well-constructed, symmetrical blanking die, with no shear and a well-aligned press ram, will result in minimum horizontal loads during the cutting process. In many dies the horizontal thrusts due to punch-to-die clearances are the only side forces present. Dies that experience significant side loads often have multiple causes, including poor alignment of die components during die construction; misalignment resulting from a miss-hit or die crash; angular contact between surfaces, such as angular form steels; nonsymmetrical forms or draws where the punch and die are loaded off-center at initial contact; the use of shear or angular cutting faces to reduce cutting forces; and cutoff, trim, bending and flanging operations where forces act on only one side of the die steel.
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