While 3D modeling sheet metal bending products, it is very important to know precise values of k-factor, so that narrow tolerances can be achieved during manufacture. For this paper to be written, samples were made from different materials and thickness of sheet metal. They were then bent based on specific parameters. Using the reverse method for calculating k-factor, we recorded them in a table that can now be used in industry. Due to other bending parameters used, based on company needs, the obtained k-factor table is adapted to the company in which the products were bent. Using the obtained table, we calculated the values of sheet metal blank lengths and compared them with already existing data.
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