Bobbin Cases for Juki Industrial Single Needle Sewing Machines. Bobbin case #B1837-012-0A0 Made in Japan. For Juki DDL-555, DDL-5550, DDL-8100, DDL-8300, DDL-8500, DDL-8700 single needle machines. We stock many types of bobbins & bobbin cases for home and industrial sewing machines. Even if you don't find the one you looking for, it does not mean we don't have it in stock. Please let us know with machine builders' reference numbers and/or machine make & model and we will find one for you.