Product Overview
The EBOOT 144 Pieces Prewound Bobbins set provides a convenient and efficient solution for your sewing and embroidery needs. This set includes 144 prewound bobbins in 24 distinct colors, with each color having 6 bobbins. Designed for compatibility with a wide range of standard household and commercial sewing machines, these bobbins are Size A (Class 15) and feature smooth, strong 75D/2 polyester filament thread.
These prewound bobbins are ideal for various craft projects, offering time-saving benefits by eliminating the need for manual bobbin winding and reducing thread fuzz. The plastic bobbin size is 2 x 2 x 1.14 cm, ensuring a proper fit for compatible machines.

Image: A comprehensive view of the 144 prewound bobbins in various colors, showcasing the product quantity and color assortment.
Key Features
- Quantity and Variety: 144 prewound bobbins in 24 different colors, with 6 bobbins per color, providing ample supply for diverse projects.
- High-Quality Thread: Made from 75D/2 filament polyester, ensuring smooth, soft, and sturdy thread that resists breaking during crafting.
- Time-Saving Convenience: Prewound bobbins eliminate the need for manual winding, allowing for quicker setup and continuous sewing.
- Reduced Fuzz: Designed to minimize thread fuzz, contributing to a cleaner and more efficient sewing process.
- Standard Size: Each bobbin is Size A (Class 15), measuring 2 x 2 x 1.14 cm, suitable for most standard household and commercial sewing machines.

Image: A detailed view of several prewound bobbins, emphasizing the vibrant array of 24 different thread colors available in the set.
Setup
Before using the EBOOT prewound bobbins, ensure your sewing or embroidery machine is compatible with Size A (Class 15) bobbins. Refer to your machine's instruction manual for specific bobbin requirements.
- Identify Bobbin Type: Confirm your machine uses 'Size A' or 'Class 15' bobbins. These prewound bobbins are designed to fit this standard.
- Select Color: Choose the desired thread color from the 24 available options for your project.
- Insert Bobbin: Open the bobbin case or access the bobbin compartment of your sewing machine. Insert the prewound bobbin according to your machine's specific loading instructions (e.g., drop-in, front-loading, or side-loading). Ensure the thread unwinds in the correct direction as indicated by your machine's manual.
- Thread Machine: Once the bobbin is correctly inserted, proceed to thread the upper part of your sewing machine as usual.

Image: A user actively engaged in sewing on a machine, with various prewound bobbins placed conveniently nearby, illustrating their readiness for use.
Operating Instructions
Using prewound bobbins simplifies the sewing process. Follow your sewing machine's standard operating procedures for optimal performance.
- Check Tension: After inserting the bobbin and threading the machine, perform a test stitch on a scrap piece of fabric to check the upper and lower thread tension. Adjust machine tension settings if necessary to achieve balanced stitches.
- Begin Sewing: Once tension is satisfactory, you can begin your sewing or embroidery project. The prewound bobbins provide consistent thread delivery, reducing interruptions.
- Monitor Thread Level: Although prewound, it is good practice to periodically check the bobbin thread level, especially during long projects, to avoid running out mid-stitch.

Image: A visual representation of the bobbin dimensions, showing the diameter and height, which are crucial for ensuring compatibility with sewing machines.
Maintenance and Storage
Proper care and storage of your prewound bobbins will ensure their longevity and maintain thread quality.
- Keep Clean: Store bobbins in a clean, dust-free environment. The plastic cases help protect the thread from dust and lint.
- Prevent Tangling: Utilize the provided packaging or a dedicated bobbin storage box to keep bobbins organized and prevent thread from unwinding or tangling.
- Avoid Direct Sunlight/Heat: Store bobbins away from direct sunlight or excessive heat, which can degrade thread quality over time.
- Handle with Care: While the plastic bobbins are durable, avoid dropping them or applying excessive force to prevent cracking.

Image: Two individuals, an adult and a child, engaging in a creative activity, with prewound bobbins laid out, demonstrating the ease of color selection and organization.
Troubleshooting
While EBOOT prewound bobbins are designed for reliability, occasional issues may arise. Here are some common troubleshooting tips:
- Thread Breaking:
- Ensure the bobbin is inserted correctly and the thread is unwinding in the proper direction.
- Check the upper thread path for any snags or incorrect threading.
- Adjust the machine's tension settings.
- Inspect the needle for bends or burrs and replace if necessary.
- Skipped Stitches:
- Verify the needle is inserted correctly and is the appropriate type and size for your fabric and thread.
- Re-thread both the upper and bobbin threads.
- Uneven Stitches:
- Adjust the upper and bobbin tension.
- Ensure the bobbin case is clean and free of lint.
- Bobbin Not Fitting:
- Confirm your machine explicitly uses Size A (Class 15) bobbins. These bobbins are standard for many machines but not universal.
- Double-check the bobbin dimensions against your machine's specifications.
For machine-specific issues, always consult your sewing machine's user manual.
Specifications
| Attribute | Detail |
|---|---|
| Material | Polyester Filament 75D/2 |
| Bobbin Type | Size A, Class 15 |
| Bobbin Dimensions | 2 x 2 x 1.14 cm (0.79 x 0.79 x 0.45 inches) |
| Quantity | 144 Pieces |
| Colors | 24 Assorted Colors (6 bobbins per color) |
| Item Weight | 0.34 Kilograms (12 ounces) |
| Product Care Instructions | Hand Wash Only (for thread) |
| Manufacturer | eBoot |
| Model Number | EBOOT-Bobbins-003 |
Compatibility
These prewound bobbins are compatible with a wide range of standard household and commercial sewing and embroidery machines, including but not limited to:
- Brother: BC-1000; CE-4000, 5000PRW, 5500PRW, 8080PRW; CP-6500, 7500; CS-100T, 5055PRW, 6000, 6000B, 6000i, 6000T, 8150; Duetta 4500D; ES-2000, EX-660; HE-120, 240; HC-1850; HS-2000; Innov-is 40, 80, 900D, 950D, 1000, 1500D, 2500D, 2800D, 4000D, 5000; LB-6770PRW, 6800PRW; LS-30, 1217, 2125, 2125i, 6770; LX-2500, 3125, 3125E; NX-200, 250, 400, 400Q, 450, 450Q, 600, 650Q; Pacesetter PS21, PS-3700; PC-210, 210PRW, 420, 420PRW; PE-500, 700, 700II, 750D, 770, 780D; Quattro 6000D; Quattro 2 6700D; QC-1000; SE-270D, 350, 400; SQ-9000, 9050; VX-1435; XL-2230, 2600, 2600i, 2610, 3100, 3500, 3750, 5130, 5232, 5340, 5500; 5600, 5700, 6452; 3510, 3500T, 6562, 7700; XR-40, 46C, 52C, 65T, 1300, 9000, 9500PRW.
- Babylock: Crafter's Choice (BLCC); Creative Pro (BL37), Creative Pro (BL40); Decorator's Choice (BLDC); Ellageo (BLL), Ellageo Plus (BLL2); Ellure (BLR); Ellure Plus (BLR3); Ellisimo (BLSO), Elisimo Gold (BLSOG); Ellegante (BLG), Ellegante 2 (BLG2), Ellegante 3 (BLG3); Esante (BLN); Espire (BLSR); Grace (BL40A); Intrigue (INT); Quilter's Choice (BLQC); Symphony (BLSY).
- Janome: All new Elna, 5000, 9000, 9500, 9700, 300E, 350E, 10000, 10001, 11000.
- Kenmore: All models.
- Singer: 6400 Series; 7312, 7322, 7350; Scholastic, Scholastic Plus XL1000, XL6000; 9910, 9920, 9940.
Note: Not compatible with Singer Futura Embroidery machines-CE-100, CE-150, CE-200, CE-250 and CE-350.
Important Notes
This product is a compatible spare part. The manufacturers' names and part numbers mentioned in this manual are for reference purposes only to indicate compatibility. They are not intended as trademarks of EBOOT. Our trademark is EBOOT.
Warranty and Support
For any questions regarding the EBOOT Prewound Bobbins, please refer to the product packaging for manufacturer contact information or visit the official EBOOT store online. Specific warranty details are not provided in this manual; please consult the manufacturer's website or customer service for warranty claims and support.





