Abstract: An attachment for a knitting machine in the form of a roll feed device to maintain an even yarn tension to the needles to provide a smooth fabric since the needles will always receive a constant tension yarn from the roll feed. The roll feed includes a bottom rubber covered roller and a top steel roller through which the yarn passes with upper and lower guide eyelets being provided for the yarn and the lower rubber covered roller being driven at a positive, adjustable speed directly from the ring gear on the bottom of the circular knitting machine cylinder. By maintaining constant tension on the yarn to the needles, a more uniform fabric is produced.