Yes
to keep the bobbin in place
A bobbin case is used for sewing on a sewing machine. It holds the bobbin in place so it is able to go in the sewing machine.
to keep the bobbin in place
I'm assuming you're talking about winding a bobbin on a sewing machine? If so, there is a post similar to the one for thread (near it) that you put the empty bobbin on. Then you put your spool of thread where it goes on the machine. You wind your thread from the spool of thread to the bobbin (there's usually a little chart on your machine, but if not, the thread goes through a hook or two and then you wind it about 4 times around the bobbin (clockwise). In newer machines you then push the bobbin toward a holder type thing that is near it. This disengages the needle from going up and down and lets the machine wind the thread as you push the pedal. On older machines, you have to turn the handle of the machine toward you and it disengages the needle, allowing the bobbin to be filled when you press the pedal. Hope this helps! You could probably google your sewing machine name and how to thread a bobbin and maybe get a diagram.
The winder allows the machine to transfer thread from a spool onto the bobbin, which provides the underside, connecting, stitches. It does a better and more even job of it that winding the thread by hand.
To install the bobbin on a New Home Model 545 sewing machine, first, ensure the machine is turned off. Remove the bobbin case from the machine and insert the bobbin so that the thread unwinds in a clockwise direction. Place the bobbin case back into the machine, ensuring it clicks securely into place. Finally, pull the thread through the slot and under the tension spring before threading the needle.
I'm not exactly sure what you are asking, but if it is "WHAT IS a sewing machine bobbin?" then I can help. The sewing machine bobbin is the round "wheel" like part that holds the thread under the sewing needle. In the older machines it was metal, and in the newer machines it is mainly plastic. Mostly, these bobbins are not interchangeable from one machine to the next. Each sewing machine brand requires its' own specific bobbin. Without the bobbin (with thread on it!) a machine is unable to sew.
A sewing bobbin is a small spool of thread that goes underneath the needle and sewing platform. It provides the lower thread for the sewing machine. Different models of machines use different bobbins, but most machines require you to create the bobbin yourself.If you'd like to see a picture of a typical sewing machine bobbin, visit the "related link" below.If you look at a diagram of the way a sewing machine works, you can see that when the needle goes down to the bobbin, the bobbin thread is pushed around the upper thread, and that is how the two pieces of fabric are joined together.The upper thread goes along the top of the seam, and the bobbin thread goes along the bottom of the seam.
SideWinder Portable Bobbin Winder is one of the easiest to fill bobbin.
The thread in the bobbin typically goes into the sewing machine in a counterclockwise direction. When you place the bobbin in the bobbin case, make sure the thread unwinds in this direction to ensure proper tension and stitching. Always refer to your specific sewing machine's manual for guidance, as some models may have unique requirements.
To thread a bobbin on a JC Penney 7036 sewing machine, first, place the spool of thread on the spool pin and thread it through the tension disc. Next, attach the bobbin to the bobbin winding spindle and push it to the right. Wind the thread around the bobbin a few times before pressing the foot pedal to start winding. Once the bobbin is filled, stop the machine, trim the thread, and remove the bobbin.
To wind a bobbin on a Singer Cocktail 6252, first ensure the sewing machine is turned off. Place the spool of thread on the spool pin and guide the thread through the thread guide and tension disk. Then, insert the bobbin onto the bobbin winder spindle, push the spindle to the right, and start the machine. The bobbin will wind as you sew, and you can stop when it's full by turning off the machine or releasing the foot pedal.