# Textile Calculation

## Consumption Formula for Single Needle Double Thread Chain Stitch Machine

Consumption Formula for Single Needle Double Thread Chain Stitch Machine
Mayedul Islam
Merchandiser at Fashion Xpress Buying House.

Introduction:

Single needle double thread chain stitch machine head could closing of all sorts of fill bags, e.g. burlap, jute, woven poly, cotton, plastic and paper with single thread chain stitch 401. It could mounted on the pedestal to be a bag closing system with pedal switch controls.
 Single Needle Double Thread Chain Stitch Machine
Features of Single Needle Double Thread Chain Stitch Machine:
1. Single needle double thread chain stitch 401.
2. High sewing speed up to 1,800 spm.
3. Sewing capacity up to 11mm (7/16 in.), 32 plies of paper.
4. Adjustable stitch length from 6.5-11mm.
5. Built-in mechanical thread chain cutter.
6. Built-in sight feed oiler.
7. Main parts are made of copper alloy and high duty alloy.
8. Rolling bearing adopted in crankshaft.
9. Easy maintenance semi closed structure.
10. Well assembly quality, ensure the stable running.
11. Low cost but reliable machine head, the most popular machine head in the market.
Consumption Formula for Single Needle Double Thread Chain Stitch:
C = (4N + 2T) × S = 4NS + 2TS = 4 + 2TS; Because, NS = 1.

Problem-1:
(a) If there are 10 stitches per inch and thickness is 0.025″, what will be threading consumption per inch?

Solution:
C = 4 + 2TS = 4 + 2 × 0.025″ × 10″ = 4.5″ (Ans.)

Problem-2:
(b) If there are 20 yds. Of chain stitches in a garment then how many meters of threads are needed for chain stitches?

Solution:

1yds = 36 inch

Then, 20 yds. = 36 × 20 = 720 inch.