62740=BC3115 Bobbin Case for Singer 31, 331K Sewing Machine
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Bobbin Case (Part #62740 / BC-31-15) – For Singer 31 & 331K
Ensure the highest level of stitching precision with the Bobbin Case (Part #62740). Specifically engineered for the Singer 31 and 331K industrial series, this bobbin case is the gold standard for maintaining consistent lower thread tension. Often referred to by the industry code BC-31-15, this component is essential for heavy-duty sewing where stitch reliability is non-negotiable.
Key Performance Features
Precision Tension Regulation: Equipped with a high-grade tension spring that provides smooth, uniform resistance, eliminating "bird-nesting" and puckered seams.
OEM Specification Fit: As a genuine-spec component, it offers the exact dimensions required for a perfect seat within the shuttle race, reducing vibration and mechanical noise.
Hardened Steel Construction: Built to withstand the high-speed rotation and friction of industrial production without warping or losing tension accuracy.
Anti-Backlash Design: Helps prevent the bobbin from over-spinning when the machine stops suddenly, ensuring your next stitch starts with perfect tension.
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.