Quick Answer

SuperBobs polyester bobbins are pre-wound, M-style bobbins designed for longarm machines. To use them, simply drop one into your bobbin case, pull the thread through the tension spring, and test the drop tension. They work best for applique, embroidery, and quilting with 60-weight thread.

Why Choose SuperBobs for Your Longarm?

SuperBobs Polyester Bobbins are pre-wound on cardboard-sided M-style bobbins, each holding 240 yards of 60-weight polyester thread. They are specifically designed for applique, bobbin thread, embroidery, and quilting. The consistent winding and fine thread help reduce tension issues and thread breaks, making them a reliable choice for longarm machines that require a smooth, steady feed.

What You Need Before Starting

Before loading a SuperBobs bobbin, make sure your longarm machine is clean and free of lint, especially around the bobbin case area. You will need a fresh SuperBobs bobbin (like the Light Yellow 60wt option), your machine's bobbin case, and a small screwdriver if you need to adjust tension. Always use the correct bobbin style for your machine—SuperBobs are M-style, so they fit most standard longarm bobbin cases.

Step-by-Step Guide to Using SuperBobs Bobbins

  1. Insert the Bobbin into the Case: Hold the SuperBobs bobbin so the thread unwinds clockwise (for most longarm machines). Drop it into the bobbin case and pull about 4-6 inches of thread through the tension spring slot. Common mistake: inserting the bobbin with the wrong unwind direction causes tension loops or thread jams. Check your machine manual for the correct direction.
  2. Check the Drop Tension: With the bobbin in the case, hold the case by the thread tail and let it drop. The case should descend slowly without free-falling. If it drops too fast, tighten the tension screw slightly; if it won't drop, loosen it. A drop test is quick but not final—always sew a test seam on scrap fabric to verify stitch quality before starting your project.
  3. Load the Bobbin into the Machine: Insert the bobbin case into the machine's hook assembly, ensuring the case latch clicks securely. Pull the thread tail through the appropriate guides and under the presser foot. Common mistake: forgetting to seat the case fully can cause the bobbin to wobble, leading to uneven stitches or thread breakage.
  4. Test the Stitch and Adjust Tension: Sew a few inches on a fabric scrap. Check the top and bottom thread loops. If loops appear on top, the bobbin tension is too loose; if loops appear on the bottom, the top tension is too tight. Adjust the bobbin case screw in small increments (1/8 turn at a time). Always make one adjustment at a time and test again. Over-adjusting can strip the screw or cause erratic tension.
  5. Replace Bobbin When Low: When the bobbin runs low, stop the machine, open the bobbin case, and remove the empty cardboard core. Insert a fresh SuperBobs bobbin and repeat the threading steps. Save partially used bobbins for smaller projects. Common mistake: letting the bobbin run completely empty can cause the needle to catch the case or damage the hook assembly. Replace when you see the thread tail near the core.

Product Facts

  • SuperBobs Polyester Bobbin 12pk M-Style Light Yellow: Tube of 12 cardboard sided bobbins. Designed for applique, bobbin thread, embroidery, and quilting. M Style Bobbins. Color: Light Yellow. Made of: Polyester. Recommended Use: Bobbin Thread. Weight: 60wt. Length: 240yds. The 60-weight polyester thread is fine yet strong, reducing bulk in the bobbin area and minimizing tension problems during long quilting sessions. The M-style fits most longarm bobbin cases, so you can swap bobbins quickly without rethreading issues.