Usha International Limited supplies Over Lock Sewing Machines. Usha International Limited is certified ISO 9001:2000 for its marketing practices. These types of sewing machines are single needle, three thread over-lock machines designed for tailors, sewing establishments and garment/hosiery industry. The vital components and moving parts of these machines such as crank, connecting rod for needle mechanism and looper mechanism are hardened for durability. The self-locking tension mechanism of these machines ensures perfect stitching even at higher speed. Over Lock Sewing Machines are ideal for seaming, trimming, over-edging, putting on cuffs and borders, edging arm holes and surging operations and hemming of fabric by fixing needle plate hemming attachment on the bed. These machines are capable of more than 3000 stitches per minute. Features of Over Lock Sewing Machines are as follows: