Stitch Type

Stitch: Class-300 (Single thread lockstitch)

Class-300 (lockstitch): The stitch is formed by two or more groups of threads inter-lacing loops of one group are passed through the material and are secured by the thread of the second group. One group is referred to as the needle thread and the other as the bobbin thread.

 Composed of a needle thread inter-locked with a bobbin thread between the piles of fabric  Lockstitches are not the nicest and, while durable, are not the most durable

Uses:

Frequently used to attach pocket, collars, cuffs and facing Top stitching, button holing, button attaching, blind stitching, etc.

Advantages: •

Flat and smooth on both sides, causing less bulk and making them comfortable • Very strong, tight and secure with 30% more extensibility • Requires less thread than many other stitches

Disadvantages: •

Bobbin thread capacity is low requiring frequent stops to reload the bobbin • Not suitable for knit fabric sewing • Rupture easily if stretched or strained • Affected by unbalanced tension more than other stitch types; this can cause puckering • More labor cost is usually involved than chainstitches • Plain or straight stitch: Same stitch made by conventional, home sewing machines. Single, straight, continuous row of stitches on both sides of fabric. Most frequently used stitch in the production of apparel and other soft goods. • Zig-zag stitch: Used for elasticity. These stitches stretch when the seam is stretched so the stitches don't rupture. More common in home sewing.

Variation: