Industrial Straight Stitch Bobbin Case (Ref. 52237)

The bobbin case is the most worn part of an industrial sewing machine, working at thousands of stitches per minute. When this component becomes loose, the spring loses tension, or the internal brake fails, the machine starts to have frequent thread breaks at high speed or loose loops under the fabric, stopping production.

This is the professional-grade replacement bobbin case (Class 95), designed for traditional oil-bath industrial lockstitch machines. It ensures consistent low thread tension and smooth unwinding, even at high RPMs, restoring industrial reliability to your machine.

(Equivalent references: 52237, 52237NBL, BC-251, BC-DB1, S03245-001, B1837-012-0A0)