What Carries the Lower Thread in the Machine

When it comes to ensuring the smooth and efficient operation of a sewing machine, one often overlooked but crucial component is the lower thread. It may not get as much attention as it’s upper thread counterpart, but the lower thread plays a vital role in creating strong, durable, and professional-quality seams. That's why it's essential to choose a thread that can withstand the rigors of frequent washes or strain.

What Holds Bottom Thread for Machine Stitching?

When it comes to machine stitching, the thread that carries the lower thread is a crucial component. One top-quality option for this purpose is the Madeira Aerolock Premium Serger thread. This thread is specifically designed to withstand frequent washes and strains, making it ideal for use in a variety of projects.

Made of 100% core-spun polyester, the Aerolock Premium Serger thread offers durability and strength. It’s core-spun design ensures that the thread holds up well under tension, preventing fraying and breakage. This makes it a reliable choice for both novice and experienced sewers.

In addition to it’s strength and durability, this thread is also versatile. It’s available in a wide range of colors, allowing you to match it to your fabric or create contrasting and decorative effects. This versatility opens up a world of creative possibilities for your sewing projects.

It’s smooth finish adds a professional touch to seams, hems, and edges, ensuring that your garments or home d├ęcor items look polished and well-crafted.

It’s core-spun polyester construction ensures reliable performance, even under frequent washes and strains. Whether you’re a beginner or a seasoned sewer, investing in this high-quality thread will result in professional and long-lasting results for your sewing projects.

Tips for Choosing the Right Thread for Different Types of Sewing Projects

  • Consider the fabric type and weight. Lighter fabrics, like silk or chiffon, require a finer thread, while heavier fabrics, like denim or upholstery, need a stronger, thicker thread.
  • Evaluate the thread fiber. Cotton thread is suitable for natural fibers, while polyester thread works well with synthetic fabrics. Silk thread is ideal for delicate fabrics.
  • Examine the thread color. Match the thread color to the main fabric color for a seamless look or choose a contrasting color for decorative stitching.
  • Check the thread strength. The thread should be strong enough to withstand the tension applied during sewing without breaking.
  • Consider the thread finish. Some threads have a matte finish, while others have a sheen or metallic appearance. Choose a finish that complements the desired sewing outcome.
  • Assess the thread thickness. Thicker threads add more texture and visibility to stitches, while thinner threads result in more inconspicuous seams.
  • Take into account the sewing machine requirements. Different sewing machines may require specific thread types or thicknesses to operate smoothly.
  • Consider the intended use of the finished project. For example, garments that require stretchability may need an elastic or stretch thread.
  • Read customer reviews or seek recommendations from fellow sewers for reliable thread brands and their suitability for various sewing projects.


It’s specifically designed to cater to sergers/overlock and coverlock machines, such as the Janome CoverPro family of machines.

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