An Overlock Sewing Machine and Its Usage in Apparel Manufacturing

In mass garment manufacturing, after lock stitch machines, overlock machines are mostly used one among many sewing machine types. Overlock machine also known as serger, over edge sewing machine and interlock sewing machine. An industrial overlocker is primarily used to sew edges of a cloth piece with clean finish.

By using an overlock machine you can make various types of stitches like, stitch class 503, stitch class 504 and stitch class 512. This machine is used in both woven and knits apparel sewing and majority used in knit garment manufacturing.
Overlock machine sunken bed
Handling and running an overlock machine easier compared to other sewing machines like lock stitch machine and coverstitch machine.

Features of an overlock machines

  • Cutting device: Overlock machines are equipped with a cutting device (knife) that cuts fabric edges (excess margin) while stitching.
  • Adjustable seam width: Width of seam can be set based on seam width needed in a design.
  • Stitch density (SPI): Stitch density can be changed in these machines 
  • Safety stitch can be sewn by overlock sewing machines.
  • Thread consumption by overlocker - thread consumption in overlock machines is higher than single needle lock stitch machines.
  • Machine bed - Normally machines come with raised bed – machine bed is raised than the table top. But in need you can use sunken bed where table top is kept in the same height of the ovelock machine bed.

Usage of overlock machines:

Over lock machines are available in 3 threads, 4 threads and 5 threads overedge sewing.

This machine is used for serging garment panels (e.g. trouser panels) and for overedge stitches (e.g. side seam of T-shirts). Ovelock machines give a clean finish to seam edges.

For an example, in a T-shirt making ovelock machine is used for operations like
  • Attaching sleeve, 
  • Joining side seam and under arm, and 
  • Attaching neck rib to neck. 
This machine is used to create ruffles, decorative edges and gathers; join laces; serge narrow sleeves, spaghetti straps, and more.

Images of overlock stitches

Here are few examples of overlock stitching
Overlock stitch @ leggings inseam
Overlock stitch
Overlock stitch @ T-shirt side seam and armhole



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Online Clothing Study: An Overlock Sewing Machine and Its Usage in Apparel Manufacturing
An Overlock Sewing Machine and Its Usage in Apparel Manufacturing
Industrial overlock stitching machine, feature of an overlock machine and its usage in garment industry.
Online Clothing Study
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