Bobbin Case (#52237 / #SC31) for Singer Industrial Sewing Machines
Achieve flawless bottom-thread tension with this High-Performance Replacement Bobbin Case. Specifically designed for high-speed Singer industrial lockstitch machines, this component ensures your bobbin rotates smoothly and delivers thread consistently for a perfect stitch every time.

Key Features & Benefits
Dual Part Compatibility: Directly replaces part numbers 52237 and SC31, offering a versatile fit for a variety of vintage and modern industrial heads.

Precision Tension Adjustment: Features a high-quality tension spring and screw, allowing you to fine-tune your bobbin tension for different thread weights and fabric types.

Anti-Spin Technology: Engineered to prevent the bobbin from over-spinning when the machine stops suddenly, eliminating tangles and "bird-nesting."

Smooth Thread Delivery: The polished interior and latch mechanism ensure snag-free thread flow, even at maximum industrial speeds.

Orders are typically processed within 1–3 business days.

We ship from our Georgia, USA warehouse. If an item is temporarily unavailable in the U.S., we source it through our global supplier network and will notify you of the estimated lead time.

Free shipping is available on U.S. orders over $99.

Once your order ships, you will receive a tracking number by email.

For urgent orders or shipping questions, please contact us before placing your order.

We stand behind the quality of the products we sell.

• Genuine OEM parts are covered by the manufacturer's warranty where applicable.

• Aftermarket and generic parts are covered against manufacturing defects.

• If you receive a damaged, defective, or incorrect item, please contact us within 30 days of delivery.

• Warranty does not cover damage caused by improper installation, misuse, normal wear, or modifications.

If you have any questions, our support team is happy to help before or after your purchase.