Bobbin Thread Tension Assembly 40210742
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Bobbin Thread Tension Assembly 40210742 for Juki LK-1900S-SS and LK-1900S Sewing Machines
The 40210742 Bobbin Thread Tension Assembly is an original replacement part designed for Juki LK-1900S-SS and Juki LK-1900S sewing machines. This important component controls the tension of the bobbin thread, helping maintain balanced stitching and smooth thread flow during sewing.
Made to meet Juki’s original manufacturing standards, this tension assembly ensures reliable performance, precise thread control, and long-lasting durability. Proper bobbin thread tension is essential for achieving neat, consistent stitches and preventing thread issues during operation.
Replacing a worn or damaged bobbin thread tension assembly with the 40210742 helps restore your machine’s performance and keeps it running efficiently in industrial sewing environments.
Key Features:
40210742 Juki replacement part
Designed to regulate bobbin thread tension
Ensures smooth thread movement and consistent stitch quality
Durable construction for long service life
Ideal for industrial sewing machine maintenance and repair
Compatible Machines:
Juki LK-1900S-SS Sewing Machine
Juki LK-1900S Sewing Machine
The 40210742 Bobbin Thread Tension Assembly is a reliable choice for maintaining the performance, accuracy, and efficiency of your Juki sewing machine.
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.