JZ Bobbin Case is a high-quality household sewing machine spare part designed for Singer HA1, JA1-1, and similar domestic sewing machines. This component holds the bobbin securely and controls the lower thread tension during sewing operations.

It is commonly used in traditional straight stitch and zigzag household sewing machines. The bobbin case works together with the shuttle hook system to ensure smooth stitch formation and stable sewing performance.

The BC-HA1 type bobbin case is widely compatible with many Singer-style domestic sewing machines and several Brother, Janome, Elgin, and Chinese household machine models.

The bobbin case holds the bobbin and helps regulate lower thread tension while the machine forms stitches. It supports smooth thread feeding and balanced stitching quality.

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.