Double sewing machine needle: what it is, how to use it, and patterns

A double sewing machine needle is a tool designed to enable parallel and symmetrical stitching, providing a level of precision and versatility that exceeds that of single needles.

Consisting of two needles attached to a single holder, the double needle is compatible with sewing machines that have a double top thread feed. This type of needle is essential for creating professional, decorative finishes such as double-stitching, often found in sportswear, denim, and stretch garments such as leggings and T-shirts.

The double needle configuration allows two parallel lines of straight stitching to be sewn on the top of the fabric, while the lower thread forms a zigzag seam that provides stretch and strength. This is especially useful for stretch materials, where seam flexibility is critical to maintain the structure and comfort of the garment.

Industry experts also particularly value the double needle for its efficiency, as it reduces the time needed to make double seams compared to using a single needle in multiple passes.

In addition, the use of double needles with different distances between the tips allows for variable effects, further increasing creativity and functionality in sewing processes. The choice of needle size and point spacing should be carefully considered according to the type of fabric and the specific application, ensuring an even and flawless seam.

The double needle is essential for working with stretch fabrics, as the zigzag seam created by the lower thread provides the necessary flexibility to prevent the seam from breaking when the fabric is stretched. A crucial feature for garments that need to maintain original shape and integrity despite movement and stretching (sportswear, lingerie, and swimwear). In addition, the double needle is also commonly used in the creation of professional hems on medium and lightweight fabrics, embellishing the aesthetic appearance of finished garments.

In addition to its functional characteristics in working with stretch fabrics, the double needle also proves very useful in creating decorative effects on a wide range of materials. In fact, parallel double needles can be used to accentuate design details, edges, and construction lines, adding a touch of sophistication and personalization to garments. The variety of double needles available, with different distances between the tips, allows tailors and designers to experiment through different stitching styles, adapting the technique to the specific needs of the project.

The double needle is also used in quilt production, where the precision of parallel stitching is very important in order to maintain uniformity of design and stability of structure. Being able to work with two upper threads also allows for the combination of different colors, creating unique and customized color effects.

Choosing the best double needle for a sewing machine depends on several factors, including the type of fabric you intend to work with, the type of machine you have, and the characteristics of the project you want to do.

In the process of choosing a double needle, therefore, it is important to consider the distance between the tips of the needles (measured in millimeters) and their diameter themselves (measured in numbers). For example, a 4.0/80 double needle has a distance of 4 mm between the tips and a diameter of 80. The choice of size will depend on the type of stitching desired and the fabric used.

Among the many models on the market are certainly the Schmetz, Organ, Klasse and Singer brands. Your choice of model will depend on your specific sewing needs, type of fabric, and compatibility with your sewing machine.

Understandably, you need to be sure to check the compatibility of the needles with the sewing machine you have. Some machines may require specific types of double needles, so you need to consult your sewing machine manual or contact an experienced and reliable dealer to make sure you are making the right choice.

In this regard, we at Fitex, a company that has specialized in the trade and production of spare parts, mechanical parts, accessories and complex solutions for the textile industry for almost half a century, can boast over 50,000 items in stock, guaranteeing fast delivery, advanced technical advice and total support for all our customers.

Therefore, we recommend that you contact us directly to request the double needle model compatible with your sewing machine and receive a customized quote as well as our specialized assistance.

Andrea Ferroli
Nadia Leonarduzzi