Simthread Prewound L-Size Bobbins 144-Pack — White 60WT Polyester for Embroidery

Simthread 144 prewound L-size (SA155) bobbins in white—60WT polyester thread made for steady, low-friction stitching on compatible embroidery and sewing machines.

If you spend hours at the embroidery machine, having a matched set of ready-to-use bobbins saves time and avoids interruptions. This pack contains 144 prewound bobbins using 100% polyester filament (70D/2, also labeled 60WT) on L-size plastic bobbins, designed to deliver consistent tension and minimize static and friction during multi-colour embroidery or heavy production runs.

How will these prewound bobbins affect machine performance?

Prewound bobbins remove the variability of hand-wound thread and help the machine run more reliably. Because the thread is wound to consistent tension and the polyester filament resists oil absorption, you’ll see fewer tension-related issues, less thread slippage, and reduced static buildup.

• Consistent factory winding for even stitch formation
• Polyester filament resists machine oil, keeping stitches clean
• 60WT (70D/2) offers fine, durable stitching suitable for detailed embroidery
• Plastic L-size bobbins fit SA155-compatible machines

Which machines and projects are these bobbins compatible with?

These L-size prewound bobbins are made for machines that accept SA155/L-size plastic bobbins, including many Husqvarna Viking, Pfaff, and certain Creative Vision models. They’re best for embroidery and general sewing projects that require a fine, high-tenacity thread rather than heavy topstitching yarns.

• Compatible with Husqvarna Viking and Pfaff models that use SA155/L bobbins
• Ideal for machine embroidery, applique, and fine garment stitching
• Not intended for machines that require metal or alternative bobbin sizes
• Check your machine manual for SA155/L bobbin acceptance

What practical benefits does 60WT 100% polyester offer?

60WT polyester thread is a fine, strong filament that balances subtle appearance with good durability. It produces a smooth, low-profile stitch, resists breaking under normal embroidery loads, and tolerates frequent handling better than many natural fibres.

• Fine 60WT weight creates detailed, low-bulk stitches
• 100% polyester filament provides high tenacity and abrasion resistance
• Reduced static and friction for cleaner embroidery runs
• White colour offers a neutral underlayer or base for most designs

How should I store and use this 144-piece bobbin pack?

Keep bobbins in a dry, dust-free place and avoid prolonged exposure to direct sunlight to preserve thread quality. Use them directly from the pack for fast colour changes during production, and rotate stock so older bobbins are used first for best consistency.

• Store in a sealed container away from humidity and UV light
• Inspect bobbin winding before loading to ensure smooth feed
• Use matching top thread weights where possible for balanced tension
• Replace any bobbins with visible damage or loose winding

Who this is for: This 144-piece bundle is aimed at home embroiderers, small sewing businesses, and production sewists who want a reliable supply of prewound L-size bobbins in white. If you own a compatible Husqvarna Viking, Pfaff, or Creative Vision machine and prefer ready-to-load bobbins that keep projects moving, this pack offers a convenient, high-tenacity option without the need to wind bobbins manually.