Uniform tension
Advanced machine winding maintains consistent thread tension from the first layer to the last.
Sewtech Size‑L (SA155) Prewound Bobbins | 70D/2 60WT Black Polyester Bobbin Thread, 144‑Piece Pack
2288
$22.88 USD
Unit price perSewtech · Embroidery Essentials
Professional Results Start with a Better Bobbin
Prewound Size‑L (SA155) Bobbins with Soft‑Spun 70D/2 Polyester Thread | Engineered for Smooth Feeding, Even Tension & Reliable High‑Speed Embroidery
Size L / SA155 70D/2 · 60 wt. Black Polyester 144 Pieces
Made for consistent stitching.
Less setup, more embroidery.
Skip manual winding and keep production moving with clean, tightly packed bobbins ready for your next design.
Break resistant
Soft‑spun polyester thread delivers reliable stitching for demanding, high‑speed embroidery applications.
Clear plastic sides
Transparent flanges resist distortion, repel machine oil absorption, and simplify quick inventory identification.
Ready to use
Eliminate pre‑winding time, letting operators swap bobbins quickly and stay focused on production.
Neat layers for smooth, predictable feeding
Every bobbin is wound tightly and evenly to minimize tension shifts between layers. This delivers smoother operation, fewer workflow interruptions, and more consistent, repeatable embroidery across entire production batches.
- Consistent thread delivery
- Reduced winding and changeover time
- Reliable batch-to-batch performance
Product specifications
Size‑L bobbins built for commercial embroidery workflows
Also known as Style L or SA155.
20.3–20.7 mmApprox. outside diameter
8.9 mmApprox. bobbin height
70D/2Soft-spun polyester
60 wt.Fine bobbin thread
Fit note: Bobbin names and dimensions can vary by machine. Check your embroidery or sewing machine manual before purchasing.Wide compatibility
Built for many multi-needle machines
Size‑L / SA155 bobbins are widely compatible with commercial embroidery machines, including models from Sewtech, Ricoma, Happy, Tajima, BAI, ZSK, and Melco. They also fit select home embroidery and sewing machines.
- Ideal for many commercial multi-needle machines
- Supports smooth high-speed stitching
- Convenient for production shops and studios
Choose the correct size
Size L is shorter than Size A
They have a similar diameter, but their heights and intended machine types differ.
Size L compared with Size A / Class 15
Reference guide for common bobbin formats
Essential white
A versatile foundation for everyday projects
This neutral‑white bobbin thread performs beautifully for embroidery, sewing and DIY projects. Its soft, cotton‑like texture makes it ideal for garments and designs worn next to the skin.
- Clean white color for versatile use
- Soft feel suitable for apparel
- Organized bulk packaging for easy storage
Create with confidence
From production runs to detailed designs
Dependable bobbin tension gives your embroidery a strong, clean foundation.
MagnaHoops
We are the official authorized manufacturer and retailer for Magnahoop® and Sewtalent™ products. We specialize in providing premium magnetic embroidery solutions directly to US customers.
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