Overlock machines finish raw edges and join seams at the same time. The number of threads changes what the seam can do.

4-thread overlock

Two needles and two loopers form a strong, stretchable seam. It is the everyday choice for T-shirts, knitwear, hosiery and light-to-medium woven fabrics. It uses less thread and is slightly quicker to set up.

5-thread overlock (safety stitch)

A 5-thread machine adds a chain stitch next to the overlock. That extra row of stitching is the "safety" seam: if the overlock edge frays, the chain stitch still holds. It is the standard for jeans, trousers, shirts and workwear where seams take stress.

Which one for your shop?

  • Tailoring shop / boutique: a 4-thread machine covers most jobs.
  • Garment factory making wovens: 5-thread for seaming, 4-thread for finishing.
  • Knitwear unit: 4-thread, and consider a flatlock for hems.

Direct-drive models save up to 70% electricity compared with clutch motors and run quieter, which matters when the machine runs all day.

Still unsure? Send us a photo of the garments you make and we will recommend the right model.