The nylofl P.T.Y. (producer textured yarn) stockings are knitted in plain stitch using a commercial seamless stocking machine. The rpm of this machine cylinder is changed in the range of 250, 450, 650, 850, 1050, and the mechanical properties of the fabrics which are produce at these rpm levels are analyzed. The experimental results using this machine show that the number of stitches per unit area, elongation, elastic recovery, resistance coefficient of elongation, and air resistance of the fabric are reduced as the rpm of the machine increased.