Functions of Sewing Machine Parts

The function of the different parts of the sewing machine is given below:

Spool Holder

The main function of the spool holder is to control the thread direction and hold the spool. Spool holder may be in the horizontal or vertical direction. Sometimes a sewing machine has more than one spool holder when decorative stitch needed.

Bobbin

The bobbin is a small spindle that is wound with thread. Bobbin supplies the bottom thread during the stitch formation.

Bobbin Case

Bobbin case holds the bobbin. The hook of the bobbin case catches the previously produced needle loop and moves over the bobbin case. As a result, a stitch is formed by the interlacing of bobbin thread & needle thread.

Thread Guide

Thread guide is used to control the direction of the thread. It also helps plenty of supply of thread

Tension Regulator

It is used to control tightness or looseness of the upper thread to avoid puckering problem.

Thread Take Up Lever

The main function of the thread take-up lever is threading the sewing needle and maintain the proper tension. If thread take-up lever is incorrect, the thread will knot up, broken & jam in the machine.

Pressure Bar Lifter

Pressure bar lifter is used for raising and lowering the pressure foot.

Stitch Length Regulator

The main function of the stitch length regulator is to maintain the length of the stitch during sewing. Stitch length may vary depending on fabric type and sewing thread that is used on it.

Balance Wheel

The main function is to raise and lower the needle through manual labor. It is used when an extremely thick piece of fabric is required to be sewn. In the domestic sewing machine, It also helps to wind the sewing thread to the bobbin. It is situated to the right side of the machine.

Slide Plate

It is a rectangular shape which is situated beside the pressure foot, it helps the removal of bobbin case without lifting the machine.

Feed Dog

It helps to pass the cloth through the machine in forwarding direction during the sewing.

Needle and Needle Bar

The main function of the needle is to form the stitch during sewing the cloth. The needle fits in the needle bar which holds the needle with a small screw.

Pressure Foot

It is used to put the pressure on the fabric during sewing. It helps to prevent wrinkle that could mess up the stitch.

Power Switch

The sewing machine is operated sometimes by electricity and manual labor. A power switch is used to supply the electricity to the machine. Normally Power switch is on the right side of the machine. The main function of the power switch is turned on and off the machine. In the modern sewing machine, to give light to the user to see properly when the machine is turned on.

Foot Pedal

It controls the speed of the sewing machine. If you apply more pressure to the pedal you can sew more faster.

Back Sew Button

Back sew is a button which is used to restitch over a very short area to increase the seam strength.

Bobbin Winder

It helps to wind the sewing thread to the bobbin.