1. Lecture 8 Sewing Machine Needle …

2. Function … Needle is the necessary part of sewing machine. Needle is the necessary part of sewing machine. Without needle, it is impossible to pass sewing thread through the fabrics or other materials to be sewn Without needle, it is impossible to pass sewing thread through the fabrics or other materials to be sewn

3. Needle …

4. Parts of needle … Shank Shank Shoulder Shoulder Blade Blade Groove Groove Scarf Scarf Eye Eye Point Point Tip Tip

5. Shank... This is the part which fits into the needle bar. This is the part which fits into the needle bar. It may be of different shapes. It may be of different shapes. One side must be flat One side must be flat To avoid Slippage To avoid Slippage

6. Blade … Diameter of this parts explains the needle Size Diameter of this parts explains the needle Size

7. Groove … Why groove is made in the needles Why groove is made in the needles To accommodate the diameter of sewing thread during stitching when needle penetrate the fabrics To accommodate the diameter of sewing thread during stitching when needle penetrate the fabrics

8. Scarf … Scarf is needed to support good loop formation. Scarf is needed to support good loop formation. Good loop formation causes stitch formation. Good loop formation causes stitch formation. Bad loop formation may cause skip or miss stitches Bad loop formation may cause skip or miss stitches

9. Eye … Sewing thread passes through the needle eye. Sewing thread passes through the needle eye. The eye must be wide enough that the thread can pass though easily. The eye must be wide enough that the thread can pass though easily. During continuous operation of machine, heat is generated due to the friction of thread and needle. During continuous operation of machine, heat is generated due to the friction of thread and needle. The synthetic thread can melt due to this heat The synthetic thread can melt due to this heat

10. Point and Tip … There are different shapes of points available There are different shapes of points available Round Point Round Point Stay Stay Rocked Rocked Flat Flat Spear Spear Square Square

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