Home » Sewtech Size L (SA155) Prewound Bobbins, 70D/2 60WT White Polyester Bobbin Thread, 144 Pack
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Sewtech Size L (SA155) Prewound Bobbins, 70D/2 60WT White Polyester Bobbin Thread, 144 Pack

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Description

Sewtech · 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, and dependable high-speed embroidery.

Size L / SA155 70D/2 · 60 wt. White 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.

1

Uniform tension

Advanced machine winding helps maintain consistent thread tension from the first layer to the last.

2

Break resistant

Soft-spun polyester thread supports reliable stitching during demanding, high-speed embroidery.

3

Clear plastic sides

Transparent flanges resist distortion, do not absorb machine oil, and make inventory easy to identify.

4

Ready to use

Eliminate pre-winding time so operators can change bobbins quickly and focus on production.

Precision machine wound

Neat layers for smooth, predictable feeding

Each bobbin is tightly and evenly wound to reduce tension changes between layers. The result is cleaner operation, fewer interruptions, and more repeatable embroidery across your batch.

  • Consistent thread delivery
  • Reduced winding and changeover time
  • Reliable batch-to-batch performance

Product specifications

Size L bobbins for commercial embroidery

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 commonly used with commercial embroidery machines, including compatible models from Sewtech, Ricoma, Happy, Tajima, BAI, ZSK, and Melco. They may also fit selected 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

The neutral white bobbin thread works beautifully across embroidery, sewing, and DIY projects. Its soft, cotton-like feel makes it a comfortable choice for garments and designs worn close 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.

Ready when inspiration strikes

Keep a dependable supply of Sewtech Size L prewound bobbins on hand and spend more time stitching—not winding.