Crochet sewing machine: what it is, how it works and patterns

The sewing machine hook, sometimes also called the hook or shank, is a key part of the sewing mechanism that works in synergy with the needle and bobbin to create stitches.

The component’s name is of French derivation: in Italian it is translated crochet hook, referring to the hook in the device that houses the bobbin and allows the upper thread to be tied to the lower thread.

Located at the bottom of the sewing machine, the looper’s function is to grasp the upper thread carried by the needle and intertwine it with the lower thread coming from the bobbin, thus forming the seam. There are mainly two types of looper: oscillating (vertical) or rotary (horizontal). Oscillating loops move back and forth, forming the stitch through an alternating motion. Rotary loops, on the other hand, rotate continuously and completely around the bobbin, providing a smoother and faster seam.

The precise operation of the loops determines the quality of the stitching. As the needle descends, it carries the top thread with it through the fabric, creating a loop at the back. At this point, the looper comes into play, rotating or swinging to catch this loop of thread and wrap it around the bobbin thread. This precise movement forms the stitch and secures the two layers of fabric together. The process must occur with perfect synchronization to avoid problems such as stitch skips, uneven tension and thread jams.

A poorly adjusted or damaged looper can seriously affect the functionality of the sewing machine. The advice, therefore, is to carry out periodic maintenance in order to ensure optimal operation of the machine.

Mechanical function aside, loops should be of high quality and made of durable materials, such as steel or hard metals, in order to limit wear and tear and ensure a long life. In addition, it is important that loops have been professionally made, because even a slight imperfection can cause significant problems during sewing. Therefore, manufacturers of high-quality sewing machines invest in advanced technology to manufacture precision loops.

Loops can also vary depending on the type of sewing machine and intended use. Industrial machines, for example, may use stronger and larger loops than domestic machines because they are called upon to handle heavier workloads on complex fabrics. Some loops are designed specifically for special seams, such as quilting or sewing on very elastic materials.

Purchasing the correct sewing machine looper requires a lot of attention and consideration of several key aspects, especially on the performance and durability of different models. Obviously, the basis is knowledge of the technical characteristics of one’s sewing machine, since loops are specific to each model and brand. Before purchasing, therefore, it will be necessary to consult the machine’s manual to identify the type of compatible looper.

In any case, relying on reputable brands such as Singer, PFAFF, Durkop, Necchi, Janome, Brother or Bernina can always be considered a safe choice, because these are manufacturers that invest a lot of resources in advanced technologies aimed at producing high-quality loops.

If you are looking for a quality looper for your sewing machine, don’t hesitate to contact Fitex, a company that has specialized for almost half a century in the trade and production of spare parts, mechanical parts, accessories and complex solutions for the textile industry.

Backed by experience gained over many decades and an assorted warehouse that can boast more than 50 thousand pieces, we are able to guarantee you all the specialized assistance you need and prompt shipment of your order.

Andrea Ferroli
Nadia Leonarduzzi