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How to adjust the needle size of sewing machine

January 17, 2024
The adjustment of needle size of sewing machine usually refers to adjusting the size of needles used in sewing machine to adapt to different thicknesses or types of fabrics. It should be noted that the "needle size" here refers to the model or size of the sewing machine needle, not an adjustment setting on the sewing machine. The size of sewing machine needle is usually expressed by numbers. The larger the number, the thicker the needle, which is suitable for thicker cloth. The smaller the number, the thinner the needle, which is suitable for thinner fabrics.

Selection of needle size of sewing machine
Thin materials (such as silk and fine cotton): Use smaller needles (such as 65/9, 70/10).
Material with medium thickness (such as ordinary cotton cloth and synthetic fiber): Use medium-sized needles (such as 80/12 and 90/14).
Thick materials (such as denim and canvas): Use larger needles (such as 100/16 and 110/18).
Special materials (such as leather and elastic cloth): Use specially designed needles (such as leather needles and elastic needles).
Adjustment step
Determine the stitch size: choose the appropriate stitch size according to the type and thickness of the fabric you want to sew.

Remove the old needle: set the sewing machine in the "off" state to ensure safety. Use a screwdriver or a tool equipped with a sewing machine to loosen the screw fixing the needle and gently take out the old needle.

Install a new needle:

Check the direction of the needle. The needle of sewing machine is usually flat on one side, which should face in a certain direction (usually towards the back of sewing machine).
Insert a new needle from the top of the needle bar, making sure to push it to the top.
Re-tighten the screw for fixing the needle.
Inspection and testing: Before starting sewing, manually rotate the sewing machine to check whether the needle is installed correctly, and ensure that it can move freely and does not touch other parts of the sewing machine. Then test sewing on a small piece of fabric of the same type to confirm.

The size and type of needles are suitable for the cloth.

matters need attention
Make sure the needle is straight: when installing a new needle, make sure the needle is straight. A bent or damaged needle may damage the cloth or sewing machine.
Correct direction: When installing the needle, make sure that its flat part faces the correct direction, usually towards the back of the sewing machine.
Don't be too tight or too loose: when installing the needle, the screw should be neither too tight nor too loose. Too tight may cause the needle to break, too loose may cause the needle to fall off during sewing.
Change the needle regularly: change the sewing needle regularly, because a blunt needle will damage the cloth and affect the sewing effect.
Suitable for fabric type: Use needles that match your fabric type. For example, elastic needles should be used for elastic fabrics and leather needles should be used for leather.
By choosing the right needle and installing it correctly, you can ensure the best sewing effect and reduce the damage to the sewing machine and cloth. If you have any questions about how to choose or replace the sewing needle, it is recommended to consult the instruction manual of the sewing machine or professionals.
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