In addition, sergers are tremendous time-savers for home sewers. Sergers sew about two to three times faster than traditional machines, and they can replace three operations with one step by sewing, cutting, and overcasting a seam simultaneously. When the machine is operating, the looper threads lock around each other and are linked together with the needle thread to form the stitches.
Most sergers can make a rolled hem.
A rolled hem is a narrow dense stitch made on the edge of the fabric. It gives a professional look, for example, to the finished edges of tablecloths, napkins, and ruffles. Others can be adjusted for rolled hemming without an attachment. Types of Sergers Sergers cannot totally replace the traditional sewing machine. They are designed to be used in addition to or in combination with a regular machine.