Check Spring Twin Needle 70221 for Singer 144W, 145W and Seiko JW-28BL Sewing Machines
Regular price
$26.03 USD
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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.
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.