SINGER 06543 Class 15J Bobbins Instruction Manual

1. Introduction

This manual provides essential information for the proper use and care of your SINGER Class 15J Transparent Plastic Bobbins. These bobbins are designed to ensure smooth and consistent stitching in compatible sewing machines.

Image 1.1: A pack of 12 SINGER Class 15J Transparent Plastic Bobbins in their clear storage case.

2. Compatibility

SINGER Class 15J bobbins are specifically designed for certain SINGER sewing machines. It is crucial to use the correct bobbin type for your machine to prevent operational issues and potential damage.

• Compatible with select SINGER Futura Embroidery Machines series: 2600s, 3900s, 7400s, 8700s.
• Compatible with SINGER Izek 1500 sewing machines.
• Important: Always consult your sewing machine's manual to confirm bobbin compatibility before use.

Class 15J bobbins are slightly curved and smaller than standard Class 15 bobbins and should not be used interchangeably.

Image 2.1: Diagram illustrating the dimensions of a SINGER Class 15J bobbin (20mm diameter, 11.7mm height, 6.1mm center hole).

3. Setup and Installation

3.1 Winding the Bobbin

1. Place an empty SINGER Class 15J bobbin onto the bobbin winding spindle of your sewing machine.
2. Follow your machine's specific instructions for threading the bobbin winding tension disk.
3. Start winding the thread onto the bobbin. Ensure the thread winds evenly and smoothly.
4. Stop winding when the bobbin is full but not overfilled.

Note: Always wind thread onto empty bobbins only. Using partially wound bobbins can lead to uneven tension and thread breakage.

3.2 Inserting the Bobbin

1. Refer to your sewing machine's manual for precise instructions on how to open the bobbin case or bobbin compartment.
2. Insert the wound bobbin into the bobbin case or compartment, ensuring the thread unwinds in the correct direction as indicated by your machine's markings.
3. Pull the bobbin thread through the tension spring or slot.
4. Close the bobbin case or compartment securely.

Image 3.1: A sewing machine in use, with several SINGER Class 15J bobbins visible in the foreground, demonstrating their transparent nature.

4. Operating Instructions

Once the bobbin is correctly installed and the machine is threaded, you can begin sewing. The bobbin thread forms the bottom part of your stitches, working in conjunction with the top spool thread to create strong, consistent seams.

• Thread Monitoring: The transparent design of SINGER Class 15J bobbins allows you to easily monitor the remaining thread, helping to prevent unexpected run-outs during sewing.
• Even Tension: Proper bobbin winding and insertion are key to maintaining even thread tension, which is essential for quality stitches.

5. Maintenance

• Regular Cleaning: After each use, remove the bobbin and brush away any lint and dust from the bobbin area and feed dogs using a small brush. This prevents buildup that can affect stitch quality.
• Inspection: Periodically inspect your bobbins for any signs of damage, such as chips, bends, or cracks. Damaged bobbins can cause thread snags, uneven tension, or even damage to your machine. Replace any compromised bobbins immediately.
• Storage: Store bobbins in a clean, dry place, preferably in a dedicated bobbin case, to protect them from dust and damage.

6. Troubleshooting Common Bobbin Issues

• Uneven Stitches: This can often be caused by incorrect bobbin winding or improper bobbin tension. Ensure the bobbin is wound evenly and inserted correctly according to your machine's manual.
• Thread Breakage: Check if the bobbin is damaged or if the thread is snagging on any rough edges. Also, verify that the bobbin is inserted with the thread unwinding in the correct direction.
• Machine Jamming: Using the wrong size or type of bobbin can lead to jamming. Always confirm that you are using SINGER Class 15J bobbins with compatible machines.

7. Product Specifications

8. Warranty and Support

For specific warranty information or technical support regarding your SINGER Class 15J Bobbins, please refer to the official SINGER website or contact SINGER customer service. Keep your purchase receipt as proof of purchase.

You can visit the official SINGER Store for more products and support: SINGER Store