Stitch Type

Stitches: Class-301 (Subclass)

Stitch Class 301 (lockstitch): Stitch is formed by a needle thread passing through the material and interlocking with a bobbin thread with the threads meeting in the center of the seam. Stitch looks the same on the top and the bottom.

Thread consumption ratio=1 : 2.5

This type of stitch is formed with 2 threads:

1 Needle thread (A) 1 Bobbin thread (B)

Stitch type 301

The loop of thread (A) is passed through the material and inter- laced with thread (B). Thread (A) is then pulled back so that the inter-lacing is midway between surfaces of the material or materials being sewn.

Ideally, this stitch should have a 1 : 1 ratio of needle to bobbin thread.

Variation: Stitch Class 301 (twin needle lockstitch): Same as 301 except that two rows of stitch are formed. Typical needle spacing is 1/4″ but the machines are available from 3/16″ up to 1″.

Face Side

Underside

Thread consumption ratio=1 : 2.5