Bobbin Case (Part #502530NBL / BC457NBL) for Singer 457 Series
Maintain consistent thread tension and professional stitch quality with this Industrial Bobbin Case. Specifically engineered for the Singer 457 series, the 502530NBL (also known as BC457NBL) is a precision-manufactured component designed to handle the high-speed demands of industrial sewing.

Key Product Highlights
NBL (No-Back-Lash) Technology: Features a built-in anti-backlash spring that prevents the bobbin from spinning over when the machine stops suddenly. This eliminates thread tangles and "bird-nesting."

Precision Tension Control: The high-quality tension spring allows for micro-adjustments, ensuring perfectly balanced stitches on everything from lightweight synthetics to medium-heavy fabrics.

Dual Part Number Compatibility: Fully interchangeable with part numbers 502530NBL and BC457NBL for a guaranteed factory fit.

Hardened Steel Build: Forged from wear-resistant industrial steel to withstand the constant friction and high RPMs of the Singer 457G and 457U.

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.