Check Spring Twin Needle 70221 for Industrial Sewing Machines
✉️ 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.
🌎 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
Check Spring (Twin Needle) 70221 for Singer 144W, 145W & Seiko JW-28BL Sewing Machines
Maintain precise thread control and smooth stitch formation with this twin needle check spring, designed for Singer 144W, 145W, and Seiko JW-28BL industrial sewing machines. This essential tension component helps regulate upper thread movement during needle operation, ensuring balanced tension, reduced slack, and consistent stitch quality—especially in twin-needle applications.
Key Features:
?? replacement part – 70221
?? Compatible with Singer 144W, 145W & Seiko JW-28BL models (Singer parts listing)
?? Designed specifically for twin-needle tension control
?? Ensures smooth thread take-up and stable stitch formation
?? High-quality spring steel for long-lasting durability
?? Helps prevent skipped stitches and thread slack
The check spring is a key part of the tension system, working in coordination with the tension discs to control thread flow during each stitch cycle, ensuring reliable performance in high-speed industrial sewing.
A dependable replacement part to keep your machine operating smoothly, accurately, and professionally.
Compatible Machines
- Singer 144W, 145W and Seiko JW-28BL
- Seiko JW-28BL-10, 20-1, 30-1
- Seiko JW-28BLC-20, 30
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.
• 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 promptly. Please see our Return & Refund Policy for eligibility, notification requirements, and applicable return terms.
• 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.