Bobbin Case with 18mm Slot (Part #BC-DBZ(1)-NBL6) for Singer 20U
Restore the precision of your under-thread delivery with the OEM Bobbin Case (Part #BC-DBZ(1)-NBL6). Specifically engineered for the Singer 20U series, this high-precision component features an extra-wide 18mm needle slot to provide maximum clearance for heavy-duty zig-zag, satin stitching, and free-motion embroidery.

This unit is equipped with "NBL" (No-Back-Lash) technology, featuring a built-in brake spring that prevents the bobbin from spinning after the machine stops. This is critical for preventing thread tangles and "bird-nesting" during high-speed industrial operation.

Key Features & Benefits
Authentic OEM Engineering: A factory part manufactured to the exact metallurgical and dimensional standards of the original Singer factory, ensuring a perfect fit and long-term durability.

Extra-Wide 18mm Slot: Specifically designed for maximum-width zig-zag operations, providing total needle clearance to prevent strikes and damage to the case during decorative work.

Anti-Backlash (NBL) Brake Spring: Includes a specialized internal spring that manages bobbin rotation, ensuring the thread stays taut and ready for the next stitch cycle even after sudden stops.

Precision Tension Control: Features a high-quality tension spring and adjustment screw, allowing the operator to fine-tune the "drag" for different thread types, from fine silk to heavy-duty bonded nylon.

Industrial Grade Construction: Crafted from hardened steel with a polished finish to resist the abrasive wear of continuous high-speed production.

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.