There are currently three popular bobbin sizes for machines: Class 15, Class L and Class M bobbins. Industrial machines usually have specialty bobbins or may not use a bobbin system …

This Bobbin Catalog and Design Manual represents over 58 years of Cosmo’s bobbin experience. It contains a newly revised and expanded edition of Cosmo’s famous Bobbin Design Manual.

pre-wound bobbins are wound with our 80wt DecoBobTM thread in a reusable plastic bobbin, which means there is no glue or wax holding it together (which also makes for a happy machine!)

Create a small amount of slack in the thread line between the tension disks and bobbin (approximately to the edge of the machine or slightly more). While holding the tail and leaving …

Pass bobbin thread through the wire loop (shaped like an inverted “U” at the front of the bobbin case) and allow 4-6 inches to hang from it, down across the front of the bobbin case.

A wooden or bone bobbin in two parts joining with a screw or push fit, and having a hollow shank containing loose miniature bobbin that jumps out ( falls) when it is opened.

Prewound Bobbin Style Guide Prewound Bobbin Style Guide is called its “style”. Each sewing machine make and model uses a specific bobbin style and will not work with other ailable for …