Overlock

A serger sewing machine, also called an overlocker, trims fabric edges and encloses them with thread in one step, creating strong, professional seams that prevent fraying and stretch with the fabric.

To sew with a serger, thread the machine correctly, place the fabric edge under the presser foot, and guide it while the serger trims and stitches simultaneously, producing a neat overlock seam.

A regular sewing machine makes straight or decorative stitches for construction and detail work, while a serger specializes in finishing edges with overlock stitches and trimming fabric for durability and a factory finish.

Serger prices range from around $250–$600 for entry-level models, $700–$1,200 for mid-range machines, and $1,500 or more for advanced or industrial-grade units.

To thread a serger, follow the color-coded threading paths for each cone of thread—loopers first, then needles—ensuring the thread passes through the guides and tension discs in the correct order.

A good serger sewing machine should have differential feed to handle stretch fabrics smoothly, an easy threading system (like color-coded paths or air threading) to save time, consistent tension control for balanced stitches, and support for multiple thread configurations (3-, 4-, or more) to give you versatility for seams, hems, and decorative finishes.

To oil a serger, turn off the power, remove lint and dust, and apply a drop of sewing machine oil to the moving metal parts specified in the manual, wiping away excess to avoid staining fabric.

Fixing a serger often means rethreading in the correct order, adjusting tension, changing needles, cleaning out lint, or oiling; for deeper issues like timing or motor problems, professional servicing is recommended.

Upholstery sewing requires a heavy duty or industrial walking-foot machine—often called a compound feed or unison feed—since these can handle thick fabrics, multiple layers, and heavy thread without slipping or skipping.