What Does a Bobbin Do? Sewing Guide

What is a Bobbin Used For?
Video of How a Bobbin Works in a Machine
Resources: Installing and Using Bobbins for Sewing Machines
 

What is the point of using a bobbin? Well, a bobbin is used for sewing thread. Outside of sewing, bobbins can be similar to cylinders or cones and will hold yarn, wire, or other similar weaving materials. Basically, any thin material that can be coiled can then be held with a bobbin.

Inside a sewing machine, a bobbin is used alongside another piece of thread to correctly sew anything pushed through the machine. A spool holds a thread somewhere on the top or side of a machine. That thread is fed through a series of loops and into the eye of the needle.

As mentioned in the introduction, the purpose of the bobbin is to hold the thread that is held below the needle. The thread from the bobbin goes up through the plate and connects with the top thread to create a sturdy stitch when the machine is in use.

In sewing, bobbins are small notions that are available to buy alone, with thread, and will most likely come with a machine if it's one of the parts utilized. In a sewing machine, the bobbin is placed under the needle in a special compartment.

Bobbins can be inserted either as is or must be inserted into a bobbin case. Bobbins are often metal, like this one, though they can also be made of plastic (usually clear).

The image below shows an example of what a bobbin and a bobbin case look like on a standard machine. The bobbin has purple thread already wrapped around the inside cylinder.
 

In this image shown below, you can see the bobbin with thread being inserted into the bobbin case. Note: when doing this, be sure to follow your machine manual's instructions for which way the thread should be facing.
 

In the image below, you can see where the bobbin case (with bobbin inside) is placed into the machine. As you can see, it is below the needle and footplate. To install it fully, read your machine manual instructions.

In general, you will carefully hand crank the needle while holding the top thread, which will pull the thread from the bobbin and up through the plate. Before adding the bobbin, you will want to have your needle threaded from the top spool.
 

Now that you have read about bobbins, the related parts, and other details, let's see it in action. Luckily our friend and sewing expert, Angel Peterson, walks you through installing a bobbin and bobbin case into a machine, which will help you do the same.

Check out her video and more on the page, How to Use a Sewing Machine.
 

How to Wind a Bobbin
This Winding and Threading Your Bobbin article from Ruffles and Stuff details with lots of pictures and instructions for how to use the winder mechanism on your machine to get thread onto the bobbin. Although all machines differ, most of the actions are the same. This is incredibly helpful if you use bobbins or are planning to start.

There is also a helpful video for How to Wind a Bobbin by Howcast. This is great if you're a visual learner. They walk you through the process and you can see the movements in real-time.

How to Insert a Bobbin
Here is another video from Singer, this time it's all about learning how to insert a bobbin into your machine.