Classification Of Needle

 Classification of Needles:

Needle can be classified on the following basis:

(i) Needle system,

(ii) Needle size, and

(iii) Needle point.

Needle System: 

It refers to the fitting measurements of the needle into the sewing machine, which enables it to be suited for a particular model/type of machine. The measurements, which are taken into account while constituting a needle system, are Shank length, shank diameter, blade length, needle length, threads grooves and clearance cut. 134 is the basic needle system and all the other systems are studied in comparison to 134 system.

Needle Size/Thickness:

It refers to the diameter of the needle blade just above the needle eye. Needle size could be indicated by the number metric system (N. M.) system or Singer/Simon co system. In case of NM system, thickness is indicated in 100th of a mm. For e.g., if blade diameter is 0.8 mm, then needle size is 0.8  100 = 80. The lower the needle size, the finer the needle blade. NM size is the European size, which is usually used in Australia, and the Simon co system is the American size.

The essential criteria that must be taken into account while choosing the right needle size are:

Thread/Seam Appearance The needle size is determined by the thickness of the thread and the desired seam appearance.

Material and Material Properties The harder and thicker the material, the thicker the needle must be. Suitable sewing machine Duty must be considered as light, medium or heavy to select suitable needle.

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