What are the different bobbin types?

We created an insightful infographic that explores the details of the three most commonly used bobbin styles: Class 15, L-style and M-style. All sewing machines are designed to only use one style of bobbin.

Table of Contents

Are all bobbin cases the same?

Plastic bobbin cases are usually used with plastic bobbins. There are many different styles of plastic bobbin cases, so it is important to check your model number when looking for replacements.

What is the difference between Class 15 and 15J bobbins?

15J came with the machine. I’ve measured everything I can measure, and I can’t see any difference between them. Class 15 bobbins and size 15J bobbins are generally not always interchangeable as the 15J is slightly smaller.

What is the difference between Class 15 and L style bobbins?

It’s worth noting that the L Style bobbins are the same diameter as the Class 15 bobbins. As such, you can use L Style bobbins in a sewing machine that uses Class 15 bobbins. However, a Class 15 bobbin is too wide to fit in a machine that uses L Style bobbins.

Are all Class 15 bobbin cases the same?

All Class 15 bobbins have flat flanges. You can buy these in plastic or metal. While they are technically interchangeable in most cases, it is recommended that you only use one or the other. The weight of the bobbin can affect your tension and the way the thread feeds.

Are class 15 bobbins flat?

The Class 15 (A Style) Bobbin: The Class 15 is about the size of an American nickel. Its diameter measures approximately 20.3 mm and has a width of approximately 11.7 mm. This bobbin has two flat sides and is available in both plastic and metal.

Are Class 15 and Class 66 bobbins interchangeable?

All Class 66 bobbins have a slightly dome-shaped flanges. Just like Class 15 bobbins, they can be purchased in plastic or metal. Most modern machines of this class will have a plastic one. Again, they can be interchanged, but it is not recommended.

What are the different types of sewing machine bobbins?

Understanding Bobbins: What Every Sewist Should Know

The Class 15 (A Style) Bobbin: The Class 15 is about the size of an American nickel.
The L Style Bobbin:
The M Style Bobbin:
The Singer 163131 Bobbin:
The Singer 8228 Bobbin:
The Class 15J Bobbin:
The Class 66 Bobbin:
The Bernina 0115367000 Bobbin:

What is the difference between plastic and metal bobbins?

Plastic bobbins can become compressed in the center causing the bobbin to distort. With metal bobbins the thread may get “stuck” causing increased bobbin tension or even cause the bobbin to “jump” in the bobbin case.

Are there different class 15 bobbins?

How do I know what class bobbin to use?

Understanding Bobbins: What Every Sewist Should Know

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The Class 15 is about the size of an American nickel.
The L Style is about the size of an American nickel.
The M Style is about the size of an American quarter.
The Singer 163131 is about the size of an American quarter.

Are metal bobbins better than plastic bobbins?

Generally, metal bobbins are better than plastic ones. So, you can use metal bobbins in your sewing machine. There are various reasons why metal bobbins are better. To begin with, they are more durable.