This Listing is for 1 BRAND NEW Highest Quality BOBBIN CASE.
Juki Bobbin Case For Industrial Lockstitch Single Needle Sewing Machines.
Complete Bobbin Case with built in anti-spin spring or brake to assist with over spinning of the thread on the bobbin when starting and stopping.
Part # : 110-38759 (11038759)
MADE IN JAPAN.
These are Bobbin Cases with NO BACK LASH spring inside.
A special anti-spin spring is built into the bobbin case assembly to prevent the bobbin from spinning when the machine is suddenly stopped. If the bobbin spins when the machine stops, there is a good chance that a single loop of thread will fall out of the bobbin case. This condition will cause the thread to snap as soon as the operator begins to sew.
No Back Lash Bobbin Cases are also required by sewing machine manufacturers for use in machines with bobbin thread undertrimmers. The anti-spin spring adds slight additional tension to the bobbin thread and stabilizes the bobbin thread just prior to actuation of the trimmer mechanism.