Bobbin Case (Part #BC-DBZ(1)-NBL). Specifically engineered for the Singer 20U series, this high-performance component features an extra-wide 18mm needle slot, making it the ideal choice for heavy-duty zig-zag, satin stitching, and professional embroidery applications.

This unit is equipped with "NBL" (No-Back-Lash) technology, which utilizes a built-in brake spring to prevent the bobbin from over-spinning when the machine stops. This is essential for preventing thread tangles and ensuring consistent tension during high-speed operation.

Key Features & Benefits
Extra-Wide 18mm Slot: Tailored for maximum-width zig-zag maneuvers, providing the necessary needle clearance to prevent strikes and ensure smooth operation during wide decorative stitching.

Anti-Backlash (NBL) System: Features an internal brake spring that maintains control over the bobbin's rotation, eliminating "bird-nesting" and thread loops after sudden stops.

Industrial-Grade Durability: Constructed from hardened high-carbon steel, this case is designed to withstand the heat and friction of continuous production environments.

Precision Tension Regulation: Equipped with a high-quality tension leaf spring and adjustment screw, allowing for micro-calibrated control over a wide variety of thread weights and types.

Mirror-Polished Finish: Every surface is polished to a high sheen to ensure the thread glides out of the case without catching or fraying.

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.