What bobbin does Singer 4423 use?

Can I use metal bobbins in my Singer 4423?

Don’t use metal bobbins! As a professional costumer, metal bobbins can hurt these machines and can make your threads break in the middle of a seam. … I bought the M/N 4423 and need additional bobbins.

What bobbins do Singer heavy duty use?

It uses a class 66 bobbin, which has more of a curve than the 15J and is slightly narrower. Like the 15J, it is shorter than the 15. If your machine came with plastic bobbins, then use only plastic bobbins.

Do all Singer sewing machines use the same bobbin case?

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. These are the most common bobbins, as they are used with removable and inset bobbin cases.

What is the difference between 15 and 15J bobbins?

They look almost identical, but class 15 bobbins have flat ends, while class 15J bobbins have slightly curved ends. Sometimes they appear to work interchangeably, but even if they fit into your sewing machine, there is a risk of them jamming your machine up and causing major damage.

THIS IS FUN:  Quick Answer: What is the importance of operating sewing machine before using?

Are metal and plastic bobbins interchangeable?

Can I interchange metal and plastic bobbins if they are the same size? Metal bobbins and plastic bobbins of the same size can NOT be swapped. Machines are set for a very precise tension setting. If they are set for a lighter plastic bobbin, the tension will change if a heavier metal bobbin is used.

Are all class 15 bobbins the same?

Are Class 15 Bobbins the Same as SA156? For the most part yes they are. But like sewing machines, bobbins are not all made the same. Even if you have the same series of a sewing machine as someone else, there will still be some differences to each machine.