Single Needle Lock Stitch Machine

Introduction

Single Needle Lock Stitch machine or SNLS in used to only for lock stitch that is the stitches of Class 300. But it can not produce all the stitches of this class. This machine is widely used in apparel industry. This is the only machine by which an entire garment can be stitched. Actually this is done in small tailoring shops. But in industry there are more stitching machine is used in parallel to make a garment perfect. 

8500 Single Needle Lock Stitch Machine

Main Parts of Single Needle Lock Stitch Machine and their function

·    Feed Dog: It feeds the material.

·    Pressure Foot: It holds the material

·    Needle Bar: It holds the needle

·    Needle Plate or Throat Plate:  it is used to support the material and helps in the smooth movement of material

·    Pressure Spring: This is used to increase or decrease the pressure on the material

·    Hand Lifter: It lift the pressure foot by hand

·    Knee Lifter: It lift the pressure foot by knee

·    Tension Post: It gives the tension to the needle thread

·    Needle Thread Take Up Spring: It gives tension to the needle thread along with the tension post

·    Stitch Length Dial: It adjust length of the stitches

·    Reverse Feed Control Lever: It form the stitches in the reverse direction

·    Hand Wheel: It helps to operate the machine manually

·    Hook Shuttle: It helps the interlacement process between needle thread and bobbin thread

·    Bobbin Case Holder: It holds the bobbin and its case together

·    Oil Sight Window: It helps in observing the presence of the adequate quantity of oil

·    Oil Pump: It circulate the oil in he machine

·    Oil Pan: It keep the oil for sufficient lubrication

·    Thread Guide: It provide the passage for thread from needle package to needle

various Parts of Sewing Machine in details(picture wise)

1. Spool pin,

2. Bobbin binder spindle,

3. Bobbin winder stopper,

4. Stitch width dial,

5. Pattern selector dial,

6. Hand wheel,

7. Stitch length dial,

8. Reverse stitch lever,

9. Power stitch,

10. Bobbin winder thread guide,

    

11. Thread tension dial,

12. Thread take-up lever,

13. Needle clamp screw,

14. Presser foot,

15. Bobbin cover,

16. Bobbin cover release button,

17. Feed dog,

18. Needle,

19. Needle plate.

Needle

A fine cylindrical pointed metal body which penetrates the through the fabric with the thread and form lock stitches

It consists of few parts

·    Shank: The upper part of needle which locate within the needle bar

·    Blade: This portion is subjected to greatest amount of friction from the material through the needle passes

·    Long Groove: The long groove in the blade provides a protective channel in which the thread is drawn through the material during stitch formation

NEEDLE

·    Short Groove: it assist the formation of loop in the needle thread

·    Scarf: It is a clearance, just above the eye. It enables close setting of the hook to the needle

·    Eye: It carry the needle thread

·    Point: It give the penetration to the material

Diagram of a Needle – DB x 1

 

 

 Bobbin

It keeps the winded bobbin thread and help in regular supply of bobbin thread for stitching.

 

Bobbin and Bobbin Case

Attaching the Bobbin and its Case to the Machine(pictures)

Bobbin cases are  holding the bobbin even they also serve tension to the lower thread for the proper and the best seam. While replacing a bobbin case, get special attention to the tension adjustment to prevent or protect aggravating problems.

 

Stitch Class 300 - Lock Stitches

In this class, stitch types are formed with two or more groups of threads, and have for a general characteristic the interlacing of the two or more groups. Loops of one group are passed through the material and are secured by the threads of a group

 Stitch Class 300 Includes Following Stitch Type   

  301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, 316, 317, 318, 319, 320, 321, 322, 323, 324, 325, 326, 327, 328, 329, 351 ETC.