Overlockers and Coverstitch

An overlocker is a specialized type of sewing machine that produces overlock stitches to sew over one or two pieces of cloth. In most cases, overlockers are used for edging, hemming, or seaming. Additionally, overlocker sewing machines that come with built-in blades will also trim off excess fabric along the edges to prevent fraying. Such machines are also known as “sergers” in the U.S.A and Canada – so don’t be confused!

Most home sewing machines can create a lockstitch to enclose the seam allowance or finish the edges of fabric. However, an overlocker uses specialised loopers to feed multiple thread cones rather than a bobbin, which is the case with conventional sewing machines that have lockstitch capability.