Metal vs. Plastic Bobbins: A Concise Guide

Choosing the right bobbin is crucial for smooth sewing and preventing machine damage. This guide outlines the differences between metal and plastic bobbins, their pros and cons, and how to choose the correct type.

Understanding Bobbins

A bobbin is a small spool that holds the bottom thread. The top and bottom threads interlock to form a stitch. Bobbins are commonly made of metal or plastic.

Common Bobbin Types

Two common bobbin types are:

• Class 15: Used in front-loading, top-loading, and side-loading machines.

• Class 66: Typically used in top-loading machines.

Metal Bobbins

• Pros: Durable, long-lasting.

• Cons: Heavier (may affect tension), can rust, sometimes more expensive.

Plastic Bobbins

• Pros: Lightweight, cost-effective, transparent (easier to see thread level), won't rust.

• Cons: Can be damaged if dropped, cheaper ones may have imperfections.

Choosing the Right Bobbin

• Consult Your Manual: The machine manual is the most reliable source for the correct bobbin type.

• Consider Machine Age: Older machines (pre-1960s/70s) often used metal; newer, especially computerized, use plastic.

• Consider Machine Type: Top-loading machines, particularly those made after the 1960s/70s, generally require plastic bobbins.

• Use the Original Type: If your machine came with a specific type, stick with it to avoid tension problems.

Video Tutorial:

For a visual guide on winding a bobbin, see our tutorial: "How to Wind a Bobbin + Tips".

Conclusion

Using the correct bobbin is essential for optimal sewing and preventing machine damage. Always refer to your sewing machine manual.