•Barteck bobbin case inner spring is a component used in barteck sewing machines.
•The inner spring is an integral part of the bobbin case assembly.
•It serves to provide tension and support to the bobbin thread during the stitching process.
•The barteck bobbin case inner spring ensures that the bobbin thread feeds smoothly and evenly, allowing for precise and consistent stitching in high-stress areas such as belt loops, pockets, or buttonholes.
