Definitely NOT interchangeable! 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.
What size is a 15J bobbin?
The Class 15J Bobbin:
The Class 15J is about the size of an American nickel. Its diameter measures approximately 20.4 mm and has a width of approximately 11.3 mm. This bobbin is only available in plastic.
What sewing machines use 15J bobbins?
Singer 12 Class 15J Bobbins
This set of 12 Class 15J transparent plastic bobbins is for use in Singer Futura Embroidery Machines series 2600s, 3900s, 7400s, 8700s and Izek 1500 sewing machines.
Are all Singer Bobbins the same?
Bobbin Tips & Hints
Use only bobbins that are the same class/style as those that come with your machine – don’t substitute! SINGER® branded bobbins are recommended for best results.
Are metal or plastic bobbins better?
The rule of thumb for bobbins is that metal ones are for metal bobbin cases and plastic ones are for plastic bobbin cases. If you try to place a metal bobbin in a plastic bobbin case you may see that the bobbin case wears out a lot faster than it is supposed to.
What is the difference between a Class 15 and Class 66 bobbin?
There are two standard types of bobbins: Class 15 for Removable (oscillating) bobbin cases and Top Drop-In Bobbin Cases and Class 66 for Top Drop-in Bobbin Cases. Bobbins have a notch on the inside opening. This locks the bobbin onto the bobbin winder.
Can I use metal bobbins in my Singer sewing machine?
Plastic bobbins and metal 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. 6.
Are there different sizes of bobbins?
Bobbins not only come in different sizes, but also in metal as well as plastic, and empty as well as pre-wound. While machines can only use one bobbin size, whether it is plastic or metal does not typically matter, however consult your machine manual to be sure.
What can I use instead of a bobbin?
There are machines that sew without a bobbin – they are called sergers, overlockers, chain stitch machines, and the thread for the underside of the fabric feeds off of a moving “looper” (a hinged hook with guides for the thread).
What are the holes in bobbins for?
Then take a look at your bobbin. There should be a tiny little hole on the side for you to put your thread through. Thread from the inside of the bobbin, out, so your thread sticks out the side an inch or two.
What bobbins does a singer simple use?
The Singer Simple 3223 sewing machine uses a very common size of bobbin – Clear (or plastic) Class 15 bobbins. This size of bobbin is easy to find at any sewing machine store or online.
Do all sewing machines have bobbins?
Most sewing machines come with 3-5 bobbins in the box. Many people say that is enough bobbins when they are just starting out, but then we see them back within a few days needing a few more.
Are Class 15 and Class 66 bobbins interchangeable?
Class 66 Bobbins
You will notice the relative shortness compared to the Class 15 bobbins. … 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.