Tension Spring B3129-012-A00
βοΈ REQUEST PRICE, AVAILABILITY & SHIPPING
This item requires confirmation before ordering.
Current pricing, availability, lead time, and machine compatibility
will be verified for your specific requirement.
Please send your machine model, required gauge or size, quantity, and clear photos of the machine nameplate or existing components when available.
Please send your machine model, required gauge or size, quantity, and clear photos of the machine nameplate or existing components when available.
π International customers are welcome.
We serve customers worldwide. Depending on product availability, orders may be sourced or fulfilled through our USA, Singapore, or international supply network.
Please include your destination country and postal code so we can review the most suitable shipping option.
REQUEST A QUOTE
We serve customers worldwide. Depending on product availability, orders may be sourced or fulfilled through our USA, Singapore, or international supply network.
Please include your destination country and postal code so we can review the most suitable shipping option.
U.S. customers may also text the product link and photos to
+1 (770) 744-3831
Tension Spring B3129-012-A00 for Juki LH-3578A Sewing Machine
The Tension Spring B3129-012-A00 is an original replacement part designed specifically for the Juki LH-3578A Sewing Machine. This essential component is part of the thread tension system and helps maintain proper thread pressure during sewing, ensuring smooth and consistent stitch formation.
Manufactured from high-quality and durable materials, this tension spring provides reliable elasticity, stable performance, and long service life in industrial environments. Proper spring tension is important for preventing thread breakage, uneven stitches, and sewing irregularities. Replacing a worn or damaged tension spring helps restore optimal thread control and machine efficiency.
This part is ideal for sewing machine technicians, garment factories, and professional operators who require accurate thread tension and dependable machine performance.
Key Features:
Tension Spring B3129-012-A00
Designed for Juki LH-3578A Sewing Machine
Maintains proper thread tension and pressure
Durable and long-lasting construction
Supports smooth sewing and consistent stitch quality
Applications:
Suitable for industrial sewing machine maintenance and repair to ensure stable thread control, improved seam strength, and reliable operation.
Most in-stock orders are processed within 3 business days, Monday through Friday. Special-order and non-stock items may require additional handling time
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.
β’ Genuine OEM parts are covered by the manufacturer's warranty where applicable.
β’ Aftermarket and generic parts are covered against manufacturing defects.
β’ If you receive a damaged, defective, or incorrect item, please contact us promptly. Please see our Return & Refund Policy for eligibility, notification requirements, and applicable return terms.
β’ Warranty does not cover damage caused by improper installation, misuse, normal wear, Return & Refund Policy modifications.
If you have any questions, our support team is happy to help before or after your purchase.